111012020121020 has 48 divisors (see below), whose sum is σ = 233641190199648. Its totient is φ = 44306537103360.

The previous prime is 111012020120941. The next prime is 111012020121031. The reversal of 111012020121020 is 20121020210111.

It is a super-2 number, since 2×111012020121020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111012020120986 and 111012020121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434598140 + ... + 434853500.

It is an arithmetic number, because the mean of its divisors is an integer number (4867524795826).

Almost surely, 2^{111012020121020} is an apocalyptic number.

111012020121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012020121020 is an abundant number, since it is smaller than the sum of its proper divisors (122629170078628).

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

111012020121020 is a wasteful number, since it uses less digits than its factorization.

111012020121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303390 (or 303388 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111012020121020 its reverse (20121020210111), we get a palindrome (131133040331131).

The spelling of 111012020121020 in words is "one hundred eleven trillion, twelve billion, twenty million, one hundred twenty-one thousand, twenty".