121011120120 has 128 divisors (see below), whose sum is σ = 408811898880. Its totient is φ = 28389696000.

The previous prime is 121011120091. The next prime is 121011120143. The reversal of 121011120120 is 21021110121.

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 = 121011120096 and 121011120105.

It is a congruent number.

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, 1437711 + ... + 1519550.

It is an arithmetic number, because the mean of its divisors is an integer number (3193842960).

Almost surely, 2^121011120120 is an apocalyptic number.

121011120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011120120 is an abundant number, since it is smaller than the sum of its proper divisors (287800778760).

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

121011120120 is a wasteful number, since it uses less digits than its factorization.

121011120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957317 (or 2957313 counting only the distinct ones).

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

Adding to 121011120120 its reverse (21021110121), we get a palindrome (142032230241).

Subtracting from 121011120120 its reverse (21021110121), we obtain a palindrome (99990009999).

The spelling of 121011120120 in words is "one hundred twenty-one billion, eleven million, one hundred twenty thousand, one hundred twenty".