1253102255021 has 8 divisors (see below), whose sum is σ = 1262673978720. Its totient is φ = 1243566181008.

The previous prime is 1253102254909. The next prime is 1253102255131. The reversal of 1253102255021 is 1205522013521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253102255021 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 (1253102255921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8841851 + ... + 8982456.

It is an arithmetic number, because the mean of its divisors is an integer number (157834247340).

Almost surely, 2^{1253102255021} is an apocalyptic number.

It is an amenable number.

1253102255021 is a deficient number, since it is larger than the sum of its proper divisors (9571723699).

1253102255021 is a wasteful number, since it uses less digits than its factorization.

1253102255021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17824843.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 1253102255021 its reverse (1205522013521), we get a palindrome (2458624268542).

The spelling of 1253102255021 in words is "one trillion, two hundred fifty-three billion, one hundred two million, two hundred fifty-five thousand, twenty-one".