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1020311113 = 1915341943

1020311113 has 4 divisors (see below), whose sum is σ = 1025653248. Its totient is φ = 1014968980.

The previous prime is 1020311111. The next prime is 1020311137. The reversal of 1020311113 is 3111130201.

1020311113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020311113 - 21 = 1020311111 is a prime.

It is a super-2 number, since 2×10203111132 = 2082069534622597538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020311093 and 1020311102.

It is not an unprimeable number, because it can be changed into a prime (1020311111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2670781 + ... + 2671162.

It is an arithmetic number, because the mean of its divisors is an integer number (256413312).

Almost surely, 21020311113 is an apocalyptic number.

It is an amenable number.

1020311113 is a deficient number, since it is larger than the sum of its proper divisors (5342135).

1020311113 is an equidigital number, since it uses as much as digits as its factorization.

1020311113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5342134.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1020311113 is about 31942.3091369425. The cubic root of 1020311113 is about 1006.7250434084.

Adding to 1020311113 its reverse (3111130201), we get a palindrome (4131441314).

It can be divided in two parts, 10203 and 11113, that added together give a square (21316 = 1462).

The spelling of 1020311113 in words is "one billion, twenty million, three hundred eleven thousand, one hundred thirteen".

Divisors: 1 191 5341943 1020311113