12452252021 has 16 divisors (see below), whose sum is σ = 14627148480. Its totient is φ = 10473742080.

The previous prime is 12452252017. The next prime is 12452252023. The reversal of 12452252021 is 12025225421.

It is a cyclic number.

It is not a de Polignac number, because 12452252021 - 2² = 12452252017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12452252023) 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, 553286 + ... + 575351.

It is an arithmetic number, because the mean of its divisors is an integer number (914196780).

Almost surely, 2^12452252021 is an apocalyptic number.

12452252021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12452252021 is a deficient number, since it is larger than the sum of its proper divisors (2174896459).

12452252021 is a wasteful number, since it uses less digits than its factorization.

12452252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128724.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 12452252021 its reverse (12025225421), we get a palindrome (24477477442).

The spelling of 12452252021 in words is "twelve billion, four hundred fifty-two million, two hundred fifty-two thousand, twenty-one".