13121015221235 has 16 divisors (see below), whose sum is σ = 15975018484992. Its totient is φ = 10343760856800.

The previous prime is 13121015221219. The next prime is 13121015221247. The reversal of 13121015221235 is 53212251012131.

It is not a de Polignac number, because 13121015221235 - 2⁴ = 13121015221219 is a prime.

It is a super-2 number, since 2×13121015221235² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13121015221198 and 13121015221207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8595221 + ... + 10005990.

It is an arithmetic number, because the mean of its divisors is an integer number (998438655312).

Almost surely, 2^{13121015221235} is an apocalyptic number.

13121015221235 is a deficient number, since it is larger than the sum of its proper divisors (2854003263757).

13121015221235 is a wasteful number, since it uses less digits than its factorization.

13121015221235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18603274.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 13121015221235 its reverse (53212251012131), we get a palindrome (66333266233366).

The spelling of 13121015221235 in words is "thirteen trillion, one hundred twenty-one billion, fifteen million, two hundred twenty-one thousand, two hundred thirty-five".