202142121231 has 16 divisors (see below), whose sum is σ = 269844506624. Its totient is φ = 134600647104.

The previous prime is 202142121227. The next prime is 202142121253. The reversal of 202142121231 is 132121241202.

It is a happy number.

It is not a de Polignac number, because 202142121231 - 2² = 202142121227 is a prime.

It is a super-2 number, since 2×202142121231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202142121198 and 202142121207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202142121431) 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, 17430771 + ... + 17442363.

It is an arithmetic number, because the mean of its divisors is an integer number (16865281664).

Almost surely, 2^202142121231 is an apocalyptic number.

202142121231 is a deficient number, since it is larger than the sum of its proper divisors (67702385393).

202142121231 is a wasteful number, since it uses less digits than its factorization.

202142121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18030.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 202142121231 its reverse (132121241202), we get a palindrome (334263362433).

The spelling of 202142121231 in words is "two hundred two billion, one hundred forty-two million, one hundred twenty-one thousand, two hundred thirty-one".