202402151229721 has 27 divisors (see below), whose sum is σ = 212299086843669. Its totient is φ = 192950725836792.

The previous prime is 202402151229667. The next prime is 202402151229769. The reversal of 202402151229721 is 127922151204202.

The square root of 202402151229721 is 14226811.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 202402151229721 - 2²⁹ = 202401614358809 is a prime.

It is a super-2 number, since 2×202402151229721² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202402251229721) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 117470777566 + ... + 117470779288.

Almost surely, 2^{202402151229721} is an apocalyptic number.

202402151229721 is the 14226811-st square number.

202402151229721 is the 7113406-th centered octagonal number.

It is an amenable number.

202402151229721 is a deficient number, since it is larger than the sum of its proper divisors (9896935613948).

202402151229721 is an frugal number, since it uses more digits than its factorization.

202402151229721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210 (or 2105 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 202402151229721 in words is "two hundred two trillion, four hundred two billion, one hundred fifty-one million, two hundred twenty-nine thousand, seven hundred twenty-one".