121532513021 has 8 divisors (see below), whose sum is σ = 121665547200. Its totient is φ = 121399542432.

The previous prime is 121532512993. The next prime is 121532513051. The reversal of 121532513021 is 120315235121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121532513021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121532513051) 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, 4480526 + ... + 4507568.

It is an arithmetic number, because the mean of its divisors is an integer number (15208193400).

Almost surely, 2^121532513021 is an apocalyptic number.

It is an amenable number.

121532513021 is a deficient number, since it is larger than the sum of its proper divisors (133034179).

121532513021 is a wasteful number, since it uses less digits than its factorization.

121532513021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31795.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 121532513021 its reverse (120315235121), we get a palindrome (241847748142).

The spelling of 121532513021 in words is "one hundred twenty-one billion, five hundred thirty-two million, five hundred thirteen thousand, twenty-one".