121156663 has 8 divisors (see below), whose sum is σ = 127185408. Its totient is φ = 115191384.

The previous prime is 121156639. The next prime is 121156667. The reversal of 121156663 is 366651121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121156663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121156667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11931 + ... + 19612.

It is an arithmetic number, because the mean of its divisors is an integer number (15898176).

Almost surely, 2^121156663 is an apocalyptic number.

121156663 is a deficient number, since it is larger than the sum of its proper divisors (6028745).

121156663 is a wasteful number, since it uses less digits than its factorization.

121156663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31733.

The product of its digits is 6480, while the sum is 31.

The square root of 121156663 is about 11007.1187419778. The cubic root of 121156663 is about 494.8221147713.

The spelling of 121156663 in words is "one hundred twenty-one million, one hundred fifty-six thousand, six hundred sixty-three".