121020120100100 has 72 divisors (see below), whose sum is σ = 282874860683520. Its totient is φ = 44674848535680.

The previous prime is 121020120100043. The next prime is 121020120100129. The reversal of 121020120100100 is 1001021020121.

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 23 ways as a sum of consecutive naturals, for example, 3783230 + ... + 16011029.

Almost surely, 2^{121020120100100} is an apocalyptic number.

121020120100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020120100100 is an abundant number, since it is smaller than the sum of its proper divisors (161854740583420).

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

121020120100100 is a wasteful number, since it uses less digits than its factorization.

121020120100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19798989 (or 19798982 counting only the distinct ones).

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

Adding to 121020120100100 its reverse (1001021020121), we get a palindrome (122021141120221).

The spelling of 121020120100100 in words is "one hundred twenty-one trillion, twenty billion, one hundred twenty million, one hundred thousand, one hundred".