121532263551 has 12 divisors (see below), whose sum is σ = 175858415928. Its totient is φ = 80877595344.

The previous prime is 121532263513. The next prime is 121532263579. The reversal of 121532263551 is 155362235121.

121532263551 is a `hidden beast` number, since 1 + 2 + 15 + 3 + 2 + 2 + 635 + 5 + 1 = 666.

It is not a de Polignac number, because 121532263551 - 2¹³ = 121532255359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121532268551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11987460 + ... + 11997593.

It is an arithmetic number, because the mean of its divisors is an integer number (14654867994).

Almost surely, 2^121532263551 is an apocalyptic number.

121532263551 is a deficient number, since it is larger than the sum of its proper divisors (54326152377).

121532263551 is a wasteful number, since it uses less digits than its factorization.

121532263551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23985622 (or 23985619 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

Adding to 121532263551 its reverse (155362235121), we get a palindrome (276894498672).

The spelling of 121532263551 in words is "one hundred twenty-one billion, five hundred thirty-two million, two hundred sixty-three thousand, five hundred fifty-one".