121086154 has 12 divisors (see below), whose sum is σ = 211283154. Its totient is φ = 51894024.

The previous prime is 121086149. The next prime is 121086157. The reversal of 121086154 is 451680121.

It can be written as a sum of positive squares in only one way, i.e., 115455025 + 5631129 = 10745^2 + 2373^2 .

It is not an unprimeable number, because it can be changed into a prime (121086157) 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, 617689 + ... + 617884.

Almost surely, 2^121086154 is an apocalyptic number.

121086154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121086154 is a deficient number, since it is larger than the sum of its proper divisors (90197000).

121086154 is a wasteful number, since it uses less digits than its factorization.

121086154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235589 (or 1235582 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 121086154 is about 11003.9153940768. The cubic root of 121086154 is about 494.7261063418.

The spelling of 121086154 in words is "one hundred twenty-one million, eighty-six thousand, one hundred fifty-four".