202040001021 has 16 divisors (see below), whose sum is σ = 271886385600. Its totient is φ = 133447340928.

The previous prime is 202040001017. The next prime is 202040001041. The reversal of 202040001021 is 120100040202.

It is not a de Polignac number, because 202040001021 - 2² = 202040001017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202040000988 and 202040001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202040001041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273691 + ... + 692088.

It is an arithmetic number, because the mean of its divisors is an integer number (16992899100).

Almost surely, 2^202040001021 is an apocalyptic number.

It is an amenable number.

202040001021 is a deficient number, since it is larger than the sum of its proper divisors (69846384579).

202040001021 is a wasteful number, since it uses less digits than its factorization.

202040001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966428.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202040001021 its reverse (120100040202), we get a palindrome (322140041223).

The spelling of 202040001021 in words is "two hundred two billion, forty million, one thousand, twenty-one".