121020213100 has 36 divisors (see below), whose sum is σ = 276435649000. Its totient is φ = 45860290560.

The previous prime is 121020213089. The next prime is 121020213101. The reversal of 121020213100 is 1312020121.

It is a super-2 number, since 2×121020213100² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121020213101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31845525 + ... + 31849324.

Almost surely, 2^121020213100 is an apocalyptic number.

121020213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020213100 is an abundant number, since it is smaller than the sum of its proper divisors (155415435900).

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

121020213100 is a wasteful number, since it uses less digits than its factorization.

121020213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63694882 (or 63694875 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121020213100 its reverse (1312020121), we get a palindrome (122332233221).

The spelling of 121020213100 in words is "one hundred twenty-one billion, twenty million, two hundred thirteen thousand, one hundred".