231210022012121 has 16 divisors (see below), whose sum is σ = 232983325132800. Its totient is φ = 229441855730688.

The previous prime is 231210022012049. The next prime is 231210022012139. The reversal of 231210022012121 is 121210220012132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231210022012121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231210022012093 and 231210022012102.

It is not an unprimeable number, because it can be changed into a prime (231210022012181) 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, 702475490 + ... + 702804548.

It is an arithmetic number, because the mean of its divisors is an integer number (14561457820800).

Almost surely, 2^{231210022012121} is an apocalyptic number.

It is an amenable number.

231210022012121 is a deficient number, since it is larger than the sum of its proper divisors (1773303120679).

231210022012121 is a wasteful number, since it uses less digits than its factorization.

231210022012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336848.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 231210022012121 its reverse (121210220012132), we get a palindrome (352420242024253).

The spelling of 231210022012121 in words is "two hundred thirty-one trillion, two hundred ten billion, twenty-two million, twelve thousand, one hundred twenty-one".