121125613 has 16 divisors (see below), whose sum is σ = 145575936. Its totient is φ = 98532720.

The previous prime is 121125607. The next prime is 121125619. The reversal of 121125613 is 316521121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121125607) and next prime (121125619).

It is a cyclic number.

It is not a de Polignac number, because 121125613 - 2¹⁷ = 120994541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121125619) 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, 18220 + ... + 23962.

It is an arithmetic number, because the mean of its divisors is an integer number (9098496).

Almost surely, 2^121125613 is an apocalyptic number.

It is an amenable number.

121125613 is a deficient number, since it is larger than the sum of its proper divisors (24450323).

121125613 is a wasteful number, since it uses less digits than its factorization.

121125613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5904.

The product of its digits is 360, while the sum is 22.

The square root of 121125613 is about 11005.7082007475. The cubic root of 121125613 is about 494.7798401962.

Adding to 121125613 its reverse (316521121), we get a palindrome (437646734).

The spelling of 121125613 in words is "one hundred twenty-one million, one hundred twenty-five thousand, six hundred thirteen".