12120121570 has 16 divisors (see below), whose sum is σ = 21854038968. Its totient is φ = 4839644160.

The previous prime is 12120121547. The next prime is 12120121589. The reversal of 12120121570 is 7512102121.

It can be written as a sum of positive squares in 4 ways, for example, as 12089662209 + 30459361 = 109953^2 + 5519^2 .

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, 1044501 + ... + 1056040.

Almost surely, 2^12120121570 is an apocalyptic number.

12120121570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12120121570 is a deficient number, since it is larger than the sum of its proper divisors (9733917398).

12120121570 is a wasteful number, since it uses less digits than its factorization.

12120121570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101125.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 12120121570 its reverse (7512102121), we get a palindrome (19632223691).

The spelling of 12120121570 in words is "twelve billion, one hundred twenty million, one hundred twenty-one thousand, five hundred seventy".