1111020312 has 64 divisors (see below), whose sum is σ = 3020461920. Its totient is φ = 339130368.

The previous prime is 1111020311. The next prime is 1111020347. The reversal of 1111020312 is 2130201111.

It is a super-2 number, since 2×1111020312² = 2468732267353154688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111020311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21703 + ... + 51894.

Almost surely, 2^1111020312 is an apocalyptic number.

1111020312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111020312 is an abundant number, since it is smaller than the sum of its proper divisors (1909441608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111020312 is a wasteful number, since it uses less digits than its factorization.

1111020312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73660 (or 73656 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1111020312 is about 33331.9713188404. The cubic root of 1111020312 is about 1035.7159544878.

Adding to 1111020312 its reverse (2130201111), we get a palindrome (3241221423).

The spelling of 1111020312 in words is "one billion, one hundred eleven million, twenty thousand, three hundred twelve".