202121988 has 12 divisors (see below), whose sum is σ = 471618000. Its totient is φ = 67373992.

The previous prime is 202121977. The next prime is 202122001. The reversal of 202121988 is 889121202.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8421738 + ... + 8421761.

It is an arithmetic number, because the mean of its divisors is an integer number (39301500).

Almost surely, 2^202121988 is an apocalyptic number.

It is an amenable number.

202121988 is an abundant number, since it is smaller than the sum of its proper divisors (269496012).

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

202121988 is a wasteful number, since it uses less digits than its factorization.

202121988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16843506 (or 16843504 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 202121988 is about 14216.9612786981. The cubic root of 202121988 is about 586.8645193264.

The spelling of 202121988 in words is "two hundred two million, one hundred twenty-one thousand, nine hundred eighty-eight".