12120121569 has 16 divisors (see below), whose sum is σ = 16650070272. Its totient is φ = 7838170368.

The previous prime is 12120121547. The next prime is 12120121589. The reversal of 12120121569 is 96512102121.

It is not a de Polignac number, because 12120121569 - 2¹¹ = 12120119521 is a prime.

It is a super-2 number, since 2×12120121569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12120121589) 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, 364414 + ... + 396279.

It is an arithmetic number, because the mean of its divisors is an integer number (1040629392).

Almost surely, 2^12120121569 is an apocalyptic number.

It is an amenable number.

12120121569 is a deficient number, since it is larger than the sum of its proper divisors (4529948703).

12120121569 is a wasteful number, since it uses less digits than its factorization.

12120121569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760856.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 12120121569 in words is "twelve billion, one hundred twenty million, one hundred twenty-one thousand, five hundred sixty-nine".