1020102011111 has 4 divisors (see below), whose sum is σ = 1021933433592. Its totient is φ = 1018270588632.

The previous prime is 1020102011107. The next prime is 1020102011113. The reversal of 1020102011111 is 1111102010201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1020102011111 - 2² = 1020102011107 is a prime.

It is a super-2 number, since 2×1020102011111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020102011092 and 1020102011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020102011113) 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, 915710405 + ... + 915711518.

It is an arithmetic number, because the mean of its divisors is an integer number (255483358398).

Almost surely, 2^{1020102011111} is an apocalyptic number.

1020102011111 is a deficient number, since it is larger than the sum of its proper divisors (1831422481).

1020102011111 is an equidigital number, since it uses as much as digits as its factorization.

1020102011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831422480.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1020102011111 its reverse (1111102010201), we get a palindrome (2131204021312).

It can be divided in two parts, 102010201 and 1111, that multiplied together give a palindrome (113333333311).

The spelling of 1020102011111 in words is "one trillion, twenty billion, one hundred two million, eleven thousand, one hundred eleven".