121530135532 has 18 divisors (see below), whose sum is σ = 230296012548. Its totient is φ = 56090831472.

The previous prime is 121530135491. The next prime is 121530135533. The reversal of 121530135532 is 235531035121.

It is a junction number, because it is equal to n+sod(n) for n = 121530135494 and 121530135503.

It is not an unprimeable number, because it can be changed into a prime (121530135533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89888478 + ... + 89889829.

Almost surely, 2^121530135532 is an apocalyptic number.

It is an amenable number.

121530135532 is a deficient number, since it is larger than the sum of its proper divisors (108765877016).

121530135532 is a wasteful number, since it uses less digits than its factorization.

121530135532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179778337 (or 179778322 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 121530135532 in words is "one hundred twenty-one billion, five hundred thirty million, one hundred thirty-five thousand, five hundred thirty-two".