121102021100 has 36 divisors (see below), whose sum is σ = 278249706504. Its totient is φ = 45591348480.

The previous prime is 121102021097. The next prime is 121102021123. The reversal of 121102021100 is 1120201121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35616542 + ... + 35619941.

It is an arithmetic number, because the mean of its divisors is an integer number (7729158514).

Almost surely, 2^121102021100 is an apocalyptic number.

121102021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102021100 is an abundant number, since it is smaller than the sum of its proper divisors (157147685404).

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

121102021100 is a wasteful number, since it uses less digits than its factorization.

121102021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71236514 (or 71236507 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121102021100 its reverse (1120201121), we get a palindrome (122222222221).

The spelling of 121102021100 in words is "one hundred twenty-one billion, one hundred two million, twenty-one thousand, one hundred".