1253453014021 has 8 divisors (see below), whose sum is σ = 1349900725880. Its totient is φ = 1157009337792.

The previous prime is 1253453013991. The next prime is 1253453014061. The reversal of 1253453014021 is 1204103543521.

It can be written as a sum of positive squares in 4 ways, for example, as 90096625921 + 1163356388100 = 300161^2 + 1078590^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1253453014021 - 2⁹ = 1253453013509 is a prime.

It is a super-2 number, since 2×1253453014021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253453014061) 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, 347766 + ... + 1621063.

It is an arithmetic number, because the mean of its divisors is an integer number (168737590735).

Almost surely, 2^{1253453014021} is an apocalyptic number.

It is an amenable number.

1253453014021 is a deficient number, since it is larger than the sum of its proper divisors (96447711859).

1253453014021 is a wasteful number, since it uses less digits than its factorization.

1253453014021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017815.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1253453014021 its reverse (1204103543521), we get a palindrome (2457556557542).

The spelling of 1253453014021 in words is "one trillion, two hundred fifty-three billion, four hundred fifty-three million, fourteen thousand, twenty-one".