121563430534531 has 8 divisors (see below), whose sum is σ = 131142790766304. Its totient is φ = 112253911436160.

The previous prime is 121563430534501. The next prime is 121563430534547. The reversal of 121563430534531 is 135435034365121.

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

It is a cyclic number.

It is not a de Polignac number, because 121563430534531 - 2²¹ = 121563428437379 is a prime.

It is a super-2 number, since 2×121563430534531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121563430534501) 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, 67460282415 + ... + 67460284216.

It is an arithmetic number, because the mean of its divisors is an integer number (16392848845788).

Almost surely, 2^{121563430534531} is an apocalyptic number.

121563430534531 is a deficient number, since it is larger than the sum of its proper divisors (9579360231773).

121563430534531 is a wasteful number, since it uses less digits than its factorization.

121563430534531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134920566701.

The product of its (nonzero) digits is 1944000, while the sum is 46.

Adding to 121563430534531 its reverse (135435034365121), we get a palindrome (256998464899652).

The spelling of 121563430534531 in words is "one hundred twenty-one trillion, five hundred sixty-three billion, four hundred thirty million, five hundred thirty-four thousand, five hundred thirty-one".