121021020228 has 96 divisors (see below), whose sum is σ = 298222331904. Its totient is φ = 38158293888.

The previous prime is 121021020203. The next prime is 121021020229. The reversal of 121021020228 is 822020120121.

It is not an unprimeable number, because it can be changed into a prime (121021020229) 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, 1972551 + ... + 2032977.

It is an arithmetic number, because the mean of its divisors is an integer number (3106482624).

Almost surely, 2^121021020228 is an apocalyptic number.

It is an amenable number.

121021020228 is an abundant number, since it is smaller than the sum of its proper divisors (177201311676).

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

121021020228 is a wasteful number, since it uses less digits than its factorization.

121021020228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60601 (or 60599 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121021020228 its reverse (822020120121), we get a palindrome (943041140349).

The spelling of 121021020228 in words is "one hundred twenty-one billion, twenty-one million, twenty thousand, two hundred twenty-eight".