231021200001 has 32 divisors (see below), whose sum is σ = 328168084608. Its totient is φ = 144057553920.

The previous prime is 231021199987. The next prime is 231021200077. The reversal of 231021200001 is 100002120132.

It is not a de Polignac number, because 231021200001 - 2⁷ = 231021199873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231021200001.

It is not an unprimeable number, because it can be changed into a prime (231021200701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15380571 + ... + 15395583.

It is an arithmetic number, because the mean of its divisors is an integer number (10255252644).

Almost surely, 2^231021200001 is an apocalyptic number.

It is an amenable number.

231021200001 is a deficient number, since it is larger than the sum of its proper divisors (97146884607).

231021200001 is a wasteful number, since it uses less digits than its factorization.

231021200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16881.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 231021200001 its reverse (100002120132), we get a palindrome (331023320133).

The spelling of 231021200001 in words is "two hundred thirty-one billion, twenty-one million, two hundred thousand, one".