12452104921 has 9 divisors (see below), whose sum is σ = 12552100533. Its totient is φ = 12352902300.

The previous prime is 12452104919. The next prime is 12452105011. The reversal of 12452104921 is 12940125421.

The square root of 12452104921 is 111589.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 12452104921 - 2¹ = 12452104919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12452105921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16849570 + ... + 16850308.

It is an arithmetic number, because the mean of its divisors is an integer number (1394677837).

Almost surely, 2^12452104921 is an apocalyptic number.

12452104921 is the 111589-th square number.

12452104921 is the 55795-th centered octagonal number.

It is an amenable number.

12452104921 is a deficient number, since it is larger than the sum of its proper divisors (99995612).

12452104921 is an frugal number, since it uses more digits than its factorization.

12452104921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 12452104921 in words is "twelve billion, four hundred fifty-two million, one hundred four thousand, nine hundred twenty-one".