12120927481 has 16 divisors (see below), whose sum is σ = 13656908160. Its totient is φ = 10673752320.

The previous prime is 12120927479. The next prime is 12120927487. The reversal of 12120927481 is 18472902121.

It is a cyclic number.

It is not a de Polignac number, because 12120927481 - 2¹ = 12120927479 is a prime.

It is a super-2 number, since 2×12120927481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12120927481.

It is not an unprimeable number, because it can be changed into a prime (12120927487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59841 + ... + 166801.

It is an arithmetic number, because the mean of its divisors is an integer number (853556760).

Almost surely, 2^12120927481 is an apocalyptic number.

It is an amenable number.

12120927481 is a deficient number, since it is larger than the sum of its proper divisors (1535980679).

12120927481 is a wasteful number, since it uses less digits than its factorization.

12120927481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107376.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 12120927481 in words is "twelve billion, one hundred twenty million, nine hundred twenty-seven thousand, four hundred eighty-one".