111212011020 has 96 divisors (see below), whose sum is σ = 343065735936. Its totient is φ = 26693536000.

The previous prime is 111212010997. The next prime is 111212011061. The reversal of 111212011020 is 20110212111.

It is a super-2 number, since 2×111212011020² (a number of 23 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 111212010987 and 111212011005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 767514 + ... + 900833.

It is an arithmetic number, because the mean of its divisors is an integer number (3573601416).

Almost surely, 2^111212011020 is an apocalyptic number.

111212011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212011020 is an abundant number, since it is smaller than the sum of its proper divisors (231853724916).

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

111212011020 is a wasteful number, since it uses less digits than its factorization.

111212011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668471 (or 1668469 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111212011020 its reverse (20110212111), we get a palindrome (131322223131).

The spelling of 111212011020 in words is "one hundred eleven billion, two hundred twelve million, eleven thousand, twenty".