203142210401021 has 16 divisors (see below), whose sum is σ = 205929275384448. Its totient is φ = 200374003128000.

The previous prime is 203142210400963. The next prime is 203142210401023. The reversal of 203142210401021 is 120104012241302.

It is a cyclic number.

It is not a de Polignac number, because 203142210401021 - 2²² = 203142206206717 is a prime.

It is a super-2 number, since 2×203142210401021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203142210401023) 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, 441094571 + ... + 441554871.

It is an arithmetic number, because the mean of its divisors is an integer number (12870579711528).

Almost surely, 2^{203142210401021} is an apocalyptic number.

It is an amenable number.

203142210401021 is a deficient number, since it is larger than the sum of its proper divisors (2787064983427).

203142210401021 is a wasteful number, since it uses less digits than its factorization.

203142210401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480772.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 203142210401021 its reverse (120104012241302), we get a palindrome (323246222642323).

The spelling of 203142210401021 in words is "two hundred three trillion, one hundred forty-two billion, two hundred ten million, four hundred one thousand, twenty-one".