231021123101 has 4 divisors (see below), whose sum is σ = 243180129600. Its totient is φ = 218862116604.

The previous prime is 231021123077. The next prime is 231021123107. The reversal of 231021123101 is 101321120132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231021123101 - 2⁶ = 231021123037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231021123101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021123107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6079503221 + ... + 6079503258.

It is an arithmetic number, because the mean of its divisors is an integer number (60795032400).

Almost surely, 2^231021123101 is an apocalyptic number.

It is an amenable number.

231021123101 is a deficient number, since it is larger than the sum of its proper divisors (12159006499).

231021123101 is a wasteful number, since it uses less digits than its factorization.

231021123101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12159006498.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 231021123101 its reverse (101321120132), we get a palindrome (332342243233).

The spelling of 231021123101 in words is "two hundred thirty-one billion, twenty-one million, one hundred twenty-three thousand, one hundred one".