121691056 has 20 divisors (see below), whose sum is σ = 237866472. Its totient is φ = 60306176.

The previous prime is 121691041. The next prime is 121691107. The reversal of 121691056 is 650196121.

It is a super-2 number, since 2×121691056² = 29617426220790272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31846 + ... + 35461.

Almost surely, 2^121691056 is an apocalyptic number.

121691056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121691056 is a deficient number, since it is larger than the sum of its proper divisors (116175416).

121691056 is a wasteful number, since it uses less digits than its factorization.

121691056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67428 (or 67422 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 121691056 is about 11031.3669143946. The cubic root of 121691056 is about 495.5485616690.

It can be divided in two parts, 12169 and 1056, that added together give a square (13225 = 115²).

The spelling of 121691056 in words is "one hundred twenty-one million, six hundred ninety-one thousand, fifty-six".