121979479533 has 8 divisors (see below), whose sum is σ = 171199269600. Its totient is φ = 77039671248.

The previous prime is 121979479499. The next prime is 121979479541. The reversal of 121979479533 is 335974979121.

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

It is not a de Polignac number, because 121979479533 - 2⁶ = 121979479469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121979479553) 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, 1069995378 + ... + 1069995491.

It is an arithmetic number, because the mean of its divisors is an integer number (21399908700).

Almost surely, 2^121979479533 is an apocalyptic number.

It is an amenable number.

121979479533 is a deficient number, since it is larger than the sum of its proper divisors (49219790067).

121979479533 is a wasteful number, since it uses less digits than its factorization.

121979479533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139990891.

The product of its digits is 12859560, while the sum is 60.

The spelling of 121979479533 in words is "one hundred twenty-one billion, nine hundred seventy-nine million, four hundred seventy-nine thousand, five hundred thirty-three".