121020111012 has 24 divisors (see below), whose sum is σ = 283300073056. Its totient is φ = 40208635008.

The previous prime is 121020111001. The next prime is 121020111049. The reversal of 121020111012 is 210111020121.

It is a super-3 number, since 3×121020111012³ (a number of 34 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16421413 + ... + 16428780.

Almost surely, 2^121020111012 is an apocalyptic number.

121020111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121020111012 is an abundant number, since it is smaller than the sum of its proper divisors (162279962044).

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

121020111012 is a wasteful number, since it uses less digits than its factorization.

121020111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32850507 (or 32850505 counting only the distinct ones).

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

Adding to 121020111012 its reverse (210111020121), we get a palindrome (331131131133).

The spelling of 121020111012 in words is "one hundred twenty-one billion, twenty million, one hundred eleven thousand, twelve".