121200021132 has 24 divisors (see below), whose sum is σ = 283973500272. Its totient is φ = 40232371200.

The previous prime is 121200021127. The next prime is 121200021191. The reversal of 121200021132 is 231120002121.

It is a super-2 number, since 2×121200021132² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20951469 + ... + 20957252.

It is an arithmetic number, because the mean of its divisors is an integer number (11832229178).

Almost surely, 2^121200021132 is an apocalyptic number.

121200021132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121200021132 is an abundant number, since it is smaller than the sum of its proper divisors (162773479140).

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

121200021132 is a wasteful number, since it uses less digits than its factorization.

121200021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41908969 (or 41908967 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121200021132 its reverse (231120002121), we get a palindrome (352320023253).

The spelling of 121200021132 in words is "one hundred twenty-one billion, two hundred million, twenty-one thousand, one hundred thirty-two".