231221010223001 has 16 divisors (see below), whose sum is σ = 233742881433600. Its totient is φ = 228703810440000.

The previous prime is 231221010222949. The next prime is 231221010223043. The reversal of 231221010223001 is 100322010122132.

It is a cyclic number.

It is not a de Polignac number, because 231221010223001 - 2¹⁰ = 231221010221977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231221010223601) 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, 417399515 + ... + 417953103.

It is an arithmetic number, because the mean of its divisors is an integer number (14608930089600).

Almost surely, 2^{231221010223001} is an apocalyptic number.

It is an amenable number.

231221010223001 is a deficient number, since it is larger than the sum of its proper divisors (2521871210599).

231221010223001 is a wasteful number, since it uses less digits than its factorization.

231221010223001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557800.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231221010223001 its reverse (100322010122132), we get a palindrome (331543020345133).

The spelling of 231221010223001 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, ten million, two hundred twenty-three thousand, one".