12121333525 has 12 divisors (see below), whose sum is σ = 17177661472. Its totient is φ = 8311771440.

The previous prime is 12121333507. The next prime is 12121333561. The reversal of 12121333525 is 52533312121.

It is not a de Polignac number, because 12121333525 - 2¹⁵ = 12121300757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121333493 and 12121333502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34632207 + ... + 34632556.

Almost surely, 2^12121333525 is an apocalyptic number.

It is an amenable number.

12121333525 is a deficient number, since it is larger than the sum of its proper divisors (5056327947).

12121333525 is an equidigital number, since it uses as much as digits as its factorization.

12121333525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69264780 (or 69264775 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

Adding to 12121333525 its reverse (52533312121), we get a palindrome (64654645646).

The spelling of 12121333525 in words is "twelve billion, one hundred twenty-one million, three hundred thirty-three thousand, five hundred twenty-five".