6112720521 has 6 divisors (see below), whose sum is σ = 8829485210. Its totient is φ = 4075147008.

The previous prime is 6112720507. The next prime is 6112720541. The reversal of 6112720521 is 1250272116.

6112720521 is a `hidden beast` number, since 6 + 112 + 7 + 20 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5879822400 + 232898121 = 76680^2 + 15261^2 .

It is not a de Polignac number, because 6112720521 - 2¹⁵ = 6112687753 is a prime.

It is a super-2 number, since 2×6112720521² = 74730704335709022882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6112720541) 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, 339595576 + ... + 339595593.

Almost surely, 2^6112720521 is an apocalyptic number.

It is an amenable number.

6112720521 is a deficient number, since it is larger than the sum of its proper divisors (2716764689).

6112720521 is a wasteful number, since it uses less digits than its factorization.

6112720521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679191175 (or 679191172 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 6112720521 is about 78183.8891396431. The cubic root of 6112720521 is about 1828.4293331219.

Adding to 6112720521 its reverse (1250272116), we get a palindrome (7362992637).

The spelling of 6112720521 in words is "six billion, one hundred twelve million, seven hundred twenty thousand, five hundred twenty-one".