120003013521 has 24 divisors (see below), whose sum is σ = 187111154880. Its totient is φ = 73884910176.

The previous prime is 120003013517. The next prime is 120003013547. The reversal of 120003013521 is 125310300021.

120003013521 is a `hidden beast` number, since 12 + 0 + 0 + 0 + 301 + 352 + 1 = 666.

It is not a de Polignac number, because 120003013521 - 2² = 120003013517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120003013494 and 120003013503.

It is not an unprimeable number, because it can be changed into a prime (120003013561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9989251 + ... + 10001256.

It is an arithmetic number, because the mean of its divisors is an integer number (7796298120).

Almost surely, 2^120003013521 is an apocalyptic number.

It is an amenable number.

120003013521 is a deficient number, since it is larger than the sum of its proper divisors (67108141359).

120003013521 is a wasteful number, since it uses less digits than its factorization.

120003013521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19990565 (or 19990562 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 120003013521 its reverse (125310300021), we get a palindrome (245313313542).

The spelling of 120003013521 in words is "one hundred twenty billion, three million, thirteen thousand, five hundred twenty-one".