121363551 has 6 divisors (see below), whose sum is σ = 175302920. Its totient is φ = 80909028.

The previous prime is 121363549. The next prime is 121363591. The reversal of 121363551 is 155363121.

121363551 is a `hidden beast` number, since 1 + 21 + 3 + 635 + 5 + 1 = 666.

It is not a de Polignac number, because 121363551 - 2¹ = 121363549 is a prime.

It is a super-2 number, since 2×121363551² = 29458223022659202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121363591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6742411 + ... + 6742428.

Almost surely, 2^121363551 is an apocalyptic number.

121363551 is a deficient number, since it is larger than the sum of its proper divisors (53939369).

121363551 is a wasteful number, since it uses less digits than its factorization.

121363551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484845 (or 13484842 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 121363551 is about 11016.5126514701. The cubic root of 121363551 is about 495.1036085540.

The spelling of 121363551 in words is "one hundred twenty-one million, three hundred sixty-three thousand, five hundred fifty-one".