121511413325 has 6 divisors (see below), whose sum is σ = 150674152554. Its totient is φ = 97209130640.

The previous prime is 121511413319. The next prime is 121511413391. The reversal of 121511413325 is 523314115121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4034536324 + 117476877001 = 63518^2 + 342749^2 .

It is not a de Polignac number, because 121511413325 - 2²² = 121507219021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2430228242 + ... + 2430228291.

It is an arithmetic number, because the mean of its divisors is an integer number (25112358759).

Almost surely, 2^121511413325 is an apocalyptic number.

It is an amenable number.

121511413325 is a deficient number, since it is larger than the sum of its proper divisors (29162739229).

121511413325 is an equidigital number, since it uses as much as digits as its factorization.

121511413325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860456543 (or 4860456538 counting only the distinct ones).

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

Adding to 121511413325 its reverse (523314115121), we get a palindrome (644825528446).

The spelling of 121511413325 in words is "one hundred twenty-one billion, five hundred eleven million, four hundred thirteen thousand, three hundred twenty-five".