231030121023 has 64 divisors (see below), whose sum is σ = 390553591680. Its totient is φ = 133714520064.

The previous prime is 231030121009. The next prime is 231030121031. The reversal of 231030121023 is 320121030132.

It is not a de Polignac number, because 231030121023 - 2⁵ = 231030120991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231030120987 and 231030121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231030125023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8895765 + ... + 8921697.

It is an arithmetic number, because the mean of its divisors is an integer number (6102399870).

Almost surely, 2^231030121023 is an apocalyptic number.

231030121023 is a deficient number, since it is larger than the sum of its proper divisors (159523470657).

231030121023 is a wasteful number, since it uses less digits than its factorization.

231030121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27465 (or 27459 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231030121023 its reverse (320121030132), we get a palindrome (551151151155).

The spelling of 231030121023 in words is "two hundred thirty-one billion, thirty million, one hundred twenty-one thousand, twenty-three".