121492913 has 4 divisors (see below), whose sum is σ = 121619520. Its totient is φ = 121366308.

The previous prime is 121492901. The next prime is 121492927. The reversal of 121492913 is 319294121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121492913 - 2²⁴ = 104715697 is a prime.

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 121492913.

It is not an unprimeable number, because it can be changed into a prime (121492933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61853 + ... + 63786.

It is an arithmetic number, because the mean of its divisors is an integer number (30404880).

Almost surely, 2^121492913 is an apocalyptic number.

It is an amenable number.

121492913 is a deficient number, since it is larger than the sum of its proper divisors (126607).

121492913 is an equidigital number, since it uses as much as digits as its factorization.

121492913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126606.

The product of its digits is 3888, while the sum is 32.

The square root of 121492913 is about 11022.3823649881. The cubic root of 121492913 is about 495.2794572052.

The spelling of 121492913 in words is "one hundred twenty-one million, four hundred ninety-two thousand, nine hundred thirteen".