231231120121 has 8 divisors (see below), whose sum is σ = 245141275904. Its totient is φ = 217724157360.

The previous prime is 231231120089. The next prime is 231231120139. The reversal of 231231120121 is 121021132132.

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

It is a cyclic number.

It is not a de Polignac number, because 231231120121 - 2⁵ = 231231120089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231231120151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100797075 + ... + 100799368.

It is an arithmetic number, because the mean of its divisors is an integer number (30642659488).

Almost surely, 2^231231120121 is an apocalyptic number.

It is an amenable number.

231231120121 is a deficient number, since it is larger than the sum of its proper divisors (13910155783).

231231120121 is a wasteful number, since it uses less digits than its factorization.

231231120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201596511.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231231120121 its reverse (121021132132), we get a palindrome (352252252253).

The spelling of 231231120121 in words is "two hundred thirty-one billion, two hundred thirty-one million, one hundred twenty thousand, one hundred twenty-one".