121551382 has 16 divisors (see below), whose sum is σ = 184559040. Its totient is φ = 60036552.

The previous prime is 121551373. The next prime is 121551407. The reversal of 121551382 is 283155121.

It is a super-2 number, since 2×121551382² = 29549476932219848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121551382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57313 + ... + 59395.

It is an arithmetic number, because the mean of its divisors is an integer number (11534940).

Almost surely, 2^121551382 is an apocalyptic number.

121551382 is a deficient number, since it is larger than the sum of its proper divisors (63007658).

121551382 is a wasteful number, since it uses less digits than its factorization.

121551382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427.

The product of its digits is 2400, while the sum is 28.

The square root of 121551382 is about 11025.0343310123. The cubic root of 121551382 is about 495.3588962705.

The spelling of 121551382 in words is "one hundred twenty-one million, five hundred fifty-one thousand, three hundred eighty-two".