121222020100 has 36 divisors (see below), whose sum is σ = 263579050000. Its totient is φ = 48391616160.

The previous prime is 121222020097. The next prime is 121222020109. The reversal of 121222020100 is 1020222121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121222020109) 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, 1164750 + ... + 1264549.

Almost surely, 2^121222020100 is an apocalyptic number.

121222020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222020100 is an abundant number, since it is smaller than the sum of its proper divisors (142357029900).

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

121222020100 is a wasteful number, since it uses less digits than its factorization.

121222020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429812 (or 2429805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121222020100 its reverse (1020222121), we get a palindrome (122242242221).

The spelling of 121222020100 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty thousand, one hundred".