13121220010231 has 4 divisors (see below), whose sum is σ = 13121238281872. Its totient is φ = 13121201738592.

The previous prime is 13121220010201. The next prime is 13121220010289. The reversal of 13121220010231 is 13201002212131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13121220010231 - 2⁹ = 13121220009719 is a prime.

It is a super-2 number, since 2×13121220010231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121220010199 and 13121220010208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121220010201) 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, 8012610 + ... + 9510223.

It is an arithmetic number, because the mean of its divisors is an integer number (3280309570468).

Almost surely, 2^{13121220010231} is an apocalyptic number.

13121220010231 is a deficient number, since it is larger than the sum of its proper divisors (18271641).

13121220010231 is an equidigital number, since it uses as much as digits as its factorization.

13121220010231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18271640.

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

Adding to 13121220010231 its reverse (13201002212131), we get a palindrome (26322222222362).

The spelling of 13121220010231 in words is "thirteen trillion, one hundred twenty-one billion, two hundred twenty million, ten thousand, two hundred thirty-one".