202423131221 has 16 divisors (see below), whose sum is σ = 217211904000. Its totient is φ = 187971114240.

The previous prime is 202423131203. The next prime is 202423131233. The reversal of 202423131221 is 122131324202.

It is a cyclic number.

It is not a de Polignac number, because 202423131221 - 2¹⁴ = 202423114837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202423131241) 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, 131780 + ... + 649778.

It is an arithmetic number, because the mean of its divisors is an integer number (13575744000).

Almost surely, 2^202423131221 is an apocalyptic number.

It is an amenable number.

202423131221 is a deficient number, since it is larger than the sum of its proper divisors (14788772779).

202423131221 is a wasteful number, since it uses less digits than its factorization.

202423131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518324.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 202423131221 its reverse (122131324202), we get a palindrome (324554455423).

The spelling of 202423131221 in words is "two hundred two billion, four hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-one".