1020311123 has 8 divisors (see below), whose sum is σ = 1102380048. Its totient is φ = 938754144.

The previous prime is 1020311111. The next prime is 1020311137. The reversal of 1020311123 is 3211130201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020311123 - 2⁴ = 1020311107 is a prime.

It is a super-2 number, since 2×1020311123² = 2082069575435042258, 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 = 1020311098 and 1020311107.

It is not an unprimeable number, because it can be changed into a prime (1020311143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123836 + ... + 131817.

It is an arithmetic number, because the mean of its divisors is an integer number (137797506).

Almost surely, 2^1020311123 is an apocalyptic number.

1020311123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020311123 is a deficient number, since it is larger than the sum of its proper divisors (82068925).

1020311123 is a wasteful number, since it uses less digits than its factorization.

1020311123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255973.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1020311123 is about 31942.3092934747. The cubic root of 1020311123 is about 1006.7250466974.

Adding to 1020311123 its reverse (3211130201), we get a palindrome (4231441324).

The spelling of 1020311123 in words is "one billion, twenty million, three hundred eleven thousand, one hundred twenty-three".