231201132021 has 48 divisors (see below), whose sum is σ = 339690903552. Its totient is φ = 151515302400.

The previous prime is 231201132007. The next prime is 231201132053. The reversal of 231201132021 is 120231102132.

231201132021 is a `hidden beast` number, since 2 + 312 + 0 + 11 + 320 + 21 = 666.

It is not a de Polignac number, because 231201132021 - 2⁶ = 231201131957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231201131985 and 231201132003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231201130021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72452536 + ... + 72455726.

It is an arithmetic number, because the mean of its divisors is an integer number (7076893824).

Almost surely, 2^231201132021 is an apocalyptic number.

It is an amenable number.

231201132021 is a deficient number, since it is larger than the sum of its proper divisors (108489771531).

231201132021 is a wasteful number, since it uses less digits than its factorization.

231201132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874 (or 3871 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231201132021 its reverse (120231102132), we get a palindrome (351432234153).

The spelling of 231201132021 in words is "two hundred thirty-one billion, two hundred one million, one hundred thirty-two thousand, twenty-one".