1252440523221 has 32 divisors (see below), whose sum is σ = 1737948960000. Its totient is φ = 801308110848.

The previous prime is 1252440523183. The next prime is 1252440523223. The reversal of 1252440523221 is 1223250442521.

It is not a de Polignac number, because 1252440523221 - 2¹⁵ = 1252440490453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252440523223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10212615 + ... + 10334523.

It is an arithmetic number, because the mean of its divisors is an integer number (54310905000).

Almost surely, 2^{1252440523221} is an apocalyptic number.

It is an amenable number.

1252440523221 is a deficient number, since it is larger than the sum of its proper divisors (485508436779).

1252440523221 is a wasteful number, since it uses less digits than its factorization.

1252440523221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122653.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 1252440523221 its reverse (1223250442521), we get a palindrome (2475690965742).

The spelling of 1252440523221 in words is "one trillion, two hundred fifty-two billion, four hundred forty million, five hundred twenty-three thousand, two hundred twenty-one".