121221020202 has 16 divisors (see below), whose sum is σ = 242458144992. Its totient is φ = 40404322640.

The previous prime is 121221020189. The next prime is 121221020203. The reversal of 121221020202 is 202020122121.

121221020202 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (121221020203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572049 + ... + 754772.

It is an arithmetic number, because the mean of its divisors is an integer number (15153634062).

Almost surely, 2^121221020202 is an apocalyptic number.

121221020202 is an abundant number, since it is smaller than the sum of its proper divisors (121237124790).

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

121221020202 is a wasteful number, since it uses less digits than its factorization.

121221020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342053.

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

Adding to 121221020202 its reverse (202020122121), we get a palindrome (323241142323).

The spelling of 121221020202 in words is "one hundred twenty-one billion, two hundred twenty-one million, twenty thousand, two hundred two".