121532351031 has 48 divisors (see below), whose sum is σ = 220134148416. Its totient is φ = 62895426048.

The previous prime is 121532351021. The next prime is 121532351053. The reversal of 121532351031 is 130153235121.

121532351031 is a `hidden beast` number, since 1 + 21 + 532 + 3 + 5 + 103 + 1 = 666.

It is not a de Polignac number, because 121532351031 - 2²² = 121528156727 is a prime.

It is a super-2 number, since 2×121532351031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121532350986 and 121532351004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121532351011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1356510 + ... + 1443323.

It is an arithmetic number, because the mean of its divisors is an integer number (4586128092).

Almost surely, 2^121532351031 is an apocalyptic number.

121532351031 is a deficient number, since it is larger than the sum of its proper divisors (98601797385).

121532351031 is a wasteful number, since it uses less digits than its factorization.

121532351031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799912 (or 2799909 counting only the distinct ones).

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

Adding to 121532351031 its reverse (130153235121), we get a palindrome (251685586152).

The spelling of 121532351031 in words is "one hundred twenty-one billion, five hundred thirty-two million, three hundred fifty-one thousand, thirty-one".