210231013121 has 4 divisors (see below), whose sum is σ = 210231955200. Its totient is φ = 210230071044.

The previous prime is 210231013093. The next prime is 210231013169. The reversal of 210231013121 is 121310132012.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 210231013121 - 2¹⁰ = 210231012097 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 210231013121.

It is not an unprimeable number, because it can be changed into a prime (210231033121) 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, 73640 + ... + 652598.

It is an arithmetic number, because the mean of its divisors is an integer number (52557988800).

Almost surely, 2^210231013121 is an apocalyptic number.

It is an amenable number.

210231013121 is a deficient number, since it is larger than the sum of its proper divisors (942079).

210231013121 is an equidigital number, since it uses as much as digits as its factorization.

210231013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942078.

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

Adding to 210231013121 its reverse (121310132012), we get a palindrome (331541145133).

The spelling of 210231013121 in words is "two hundred ten billion, two hundred thirty-one million, thirteen thousand, one hundred twenty-one".