121565250063 has 32 divisors (see below), whose sum is σ = 185065745600. Its totient is φ = 78809822208.

The previous prime is 121565250047. The next prime is 121565250089. The reversal of 121565250063 is 360052565121.

121565250063 is a `hidden beast` number, since 1 + 21 + 56 + 525 + 0 + 0 + 63 = 666.

It is not a de Polignac number, because 121565250063 - 2⁴ = 121565250047 is a prime.

It is a super-2 number, since 2×121565250063² (a number of 23 digits) 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 (121565250013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1838643 + ... + 1903611.

It is an arithmetic number, because the mean of its divisors is an integer number (5783304550).

Almost surely, 2^121565250063 is an apocalyptic number.

121565250063 is a deficient number, since it is larger than the sum of its proper divisors (63500495537).

121565250063 is a wasteful number, since it uses less digits than its factorization.

121565250063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66888 (or 66882 counting only the distinct ones).

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

The spelling of 121565250063 in words is "one hundred twenty-one billion, five hundred sixty-five million, two hundred fifty thousand, sixty-three".