121381056 has 42 divisors (see below), whose sum is σ = 347918532. Its totient is φ = 40460160.

The previous prime is 121381031. The next prime is 121381061. The reversal of 121381056 is 650183121.

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, 104790 + ... + 105941.

Almost surely, 2^121381056 is an apocalyptic number.

121381056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121381056 is an abundant number, since it is smaller than the sum of its proper divisors (226537476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121381056 is a wasteful number, since it uses less digits than its factorization.

121381056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210749 (or 210736 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 121381056 is about 11017.3071119943. The cubic root of 121381056 is about 495.1274113403.

The spelling of 121381056 in words is "one hundred twenty-one million, three hundred eighty-one thousand, fifty-six".