13121015221151 has 6 divisors (see below), whose sum is σ = 13557927279456. Its totient is φ = 12697756664700.

The previous prime is 13121015221123. The next prime is 13121015221183. The reversal of 13121015221151 is 15112251012131.

It is not a de Polignac number, because 13121015221151 - 2¹⁰ = 13121015220127 is a prime.

It is a super-2 number, since 2×13121015221151² (a number of 27 digits) contains 22 as substring.

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 13121015221151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121015221051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6826749935 + ... + 6826751856.

It is an arithmetic number, because the mean of its divisors is an integer number (2259654546576).

Almost surely, 2^{13121015221151} is an apocalyptic number.

13121015221151 is a deficient number, since it is larger than the sum of its proper divisors (436912058305).

13121015221151 is an equidigital number, since it uses as much as digits as its factorization.

13121015221151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13653501853 (or 13653501822 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 26.

Adding to 13121015221151 its reverse (15112251012131), we get a palindrome (28233266233282).

The spelling of 13121015221151 in words is "thirteen trillion, one hundred twenty-one billion, fifteen million, two hundred twenty-one thousand, one hundred fifty-one".