121279293 has 6 divisors (see below), whose sum is σ = 175181214. Its totient is φ = 80852856.

The previous prime is 121279283. The next prime is 121279297. The reversal of 121279293 is 392972121.

It can be written as a sum of positive squares in only one way, i.e., 113678244 + 7601049 = 10662^2 + 2757^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121279293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121279297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6737730 + ... + 6737747.

It is an arithmetic number, because the mean of its divisors is an integer number (29196869).

Almost surely, 2^121279293 is an apocalyptic number.

It is an amenable number.

121279293 is a deficient number, since it is larger than the sum of its proper divisors (53901921).

121279293 is a wasteful number, since it uses less digits than its factorization.

121279293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13475483 (or 13475480 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 121279293 is about 11012.6878190567. The cubic root of 121279293 is about 494.9890049593.

It can be divided in two parts, 12127 and 9293, that multiplied together give a palindrome (112696211).

The spelling of 121279293 in words is "one hundred twenty-one million, two hundred seventy-nine thousand, two hundred ninety-three".