202121029989 has 12 divisors (see below), whose sum is σ = 293029918272. Its totient is φ = 134250129000.

The previous prime is 202121029973. The next prime is 202121030003. The reversal of 202121029989 is 989920121202.

It is not a de Polignac number, because 202121029989 - 2⁴ = 202121029973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121029949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41432787 + ... + 41437664.

It is an arithmetic number, because the mean of its divisors is an integer number (24419159856).

Almost surely, 2^202121029989 is an apocalyptic number.

It is an amenable number.

202121029989 is a deficient number, since it is larger than the sum of its proper divisors (90908888283).

202121029989 is a wasteful number, since it uses less digits than its factorization.

202121029989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82870728 (or 82870725 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 202121029989 in words is "two hundred two billion, one hundred twenty-one million, twenty-nine thousand, nine hundred eighty-nine".