202121022004 has 24 divisors (see below), whose sum is σ = 385910532000. Its totient is φ = 91862923680.

The previous prime is 202121021989. The next prime is 202121022023. The reversal of 202121022004 is 400220121202.

It is a congruent number.

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, 148647 + ... + 652945.

It is an arithmetic number, because the mean of its divisors is an integer number (16079605500).

Almost surely, 2^202121022004 is an apocalyptic number.

It is an amenable number.

202121022004 is a deficient number, since it is larger than the sum of its proper divisors (183789509996).

202121022004 is a wasteful number, since it uses less digits than its factorization.

202121022004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513423 (or 513421 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202121022004 its reverse (400220121202), we get a palindrome (602341143206).

The spelling of 202121022004 in words is "two hundred two billion, one hundred twenty-one million, twenty-two thousand, four".