121361513 has 16 divisors (see below), whose sum is σ = 151823616. Its totient is φ = 94443840.

The previous prime is 121361509. The next prime is 121361533. The reversal of 121361513 is 315163121.

It is a cyclic number.

It is not a de Polignac number, because 121361513 - 2² = 121361509 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121361533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5381 + ... + 16482.

It is an arithmetic number, because the mean of its divisors is an integer number (9488976).

Almost surely, 2^121361513 is an apocalyptic number.

121361513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121361513 is a deficient number, since it is larger than the sum of its proper divisors (30462103).

121361513 is a wasteful number, since it uses less digits than its factorization.

121361513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21944.

The product of its digits is 540, while the sum is 23.

The square root of 121361513 is about 11016.4201535708. The cubic root of 121361513 is about 495.1008371925.

It can be divided in two parts, 1213 and 61513, that added together give a palindrome (62726).

The spelling of 121361513 in words is "one hundred twenty-one million, three hundred sixty-one thousand, five hundred thirteen".