121202210220 has 96 divisors (see below), whose sum is σ = 417681481728. Its totient is φ = 25572333312.

The previous prime is 121202210201. The next prime is 121202210221. The reversal of 121202210220 is 22012202121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121202210220.

It is not an unprimeable number, because it can be changed into a prime (121202210221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11093644 + ... + 11104563.

It is an arithmetic number, because the mean of its divisors is an integer number (4350848768).

Almost surely, 2^121202210220 is an apocalyptic number.

121202210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121202210220 is an abundant number, since it is smaller than the sum of its proper divisors (296479271508).

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

121202210220 is a wasteful number, since it uses less digits than its factorization.

121202210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22198239 (or 22198237 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121202210220 its reverse (22012202121), we get a palindrome (143214412341).

The spelling of 121202210220 in words is "one hundred twenty-one billion, two hundred two million, two hundred ten thousand, two hundred twenty".