121102111020 has 96 divisors (see below), whose sum is σ = 377782465536. Its totient is φ = 28733440000.

The previous prime is 121102110989. The next prime is 121102111033. The reversal of 121102111020 is 20111201121.

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 = 121102110987 and 121102111005.

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, 1920981 + ... + 1983020.

It is an arithmetic number, because the mean of its divisors is an integer number (3935234016).

Almost surely, 2^121102111020 is an apocalyptic number.

121102111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102111020 is an abundant number, since it is smaller than the sum of its proper divisors (256680354516).

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

121102111020 is a wasteful number, since it uses less digits than its factorization.

121102111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904071 (or 3904069 counting only the distinct ones).

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

Adding to 121102111020 its reverse (20111201121), we get a palindrome (141213312141).

The spelling of 121102111020 in words is "one hundred twenty-one billion, one hundred two million, one hundred eleven thousand, twenty".