121520079605 has 8 divisors (see below), whose sum is σ = 147267899064. Its totient is φ = 96253528000.

The previous prime is 121520079587. The next prime is 121520079613. The reversal of 121520079605 is 506970025121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 54934921924 + 66585157681 = 234382^2 + 258041^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-121520079605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120316406 + ... + 120317415.

It is an arithmetic number, because the mean of its divisors is an integer number (18408487383).

Almost surely, 2^121520079605 is an apocalyptic number.

It is an amenable number.

121520079605 is a deficient number, since it is larger than the sum of its proper divisors (25747819459).

121520079605 is a wasteful number, since it uses less digits than its factorization.

121520079605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240633927.

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 121520079605 in words is "one hundred twenty-one billion, five hundred twenty million, seventy-nine thousand, six hundred five".