121308538 has 12 divisors (see below), whose sum is σ = 197037198. Its totient is φ = 55988400.

The previous prime is 121308527. The next prime is 121308563. The reversal of 121308538 is 835803121.

It can be written as a sum of positive squares in 3 ways, for example, as 102272769 + 19035769 = 10113^2 + 4363^2 .

It is a super-2 number, since 2×121308538² = 29431522783394888, which contains 22 as substring.

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, 179113 + ... + 179788.

Almost surely, 2^121308538 is an apocalyptic number.

121308538 is a deficient number, since it is larger than the sum of its proper divisors (75728660).

121308538 is a wasteful number, since it uses less digits than its factorization.

121308538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358929 (or 358916 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 121308538 is about 11014.0155256836. The cubic root of 121308538 is about 495.0287885852.

The spelling of 121308538 in words is "one hundred twenty-one million, three hundred eight thousand, five hundred thirty-eight".