202131421671 has 8 divisors (see below), whose sum is σ = 278202386944. Its totient is φ = 130407368760.

The previous prime is 202131421631. The next prime is 202131421747. The reversal of 202131421671 is 176124131202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202131421671 - 2³¹ = 199983938023 is a prime.

It is a super-2 number, since 2×202131421671² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202131421631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086727981 + ... + 1086728166.

It is an arithmetic number, because the mean of its divisors is an integer number (34775298368).

Almost surely, 2^202131421671 is an apocalyptic number.

202131421671 is a deficient number, since it is larger than the sum of its proper divisors (76070965273).

202131421671 is a wasteful number, since it uses less digits than its factorization.

202131421671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173456181.

The product of its (nonzero) digits is 4032, while the sum is 30.

Adding to 202131421671 its reverse (176124131202), we get a palindrome (378255552873).

The spelling of 202131421671 in words is "two hundred two billion, one hundred thirty-one million, four hundred twenty-one thousand, six hundred seventy-one".