1253405252221 has 8 divisors (see below), whose sum is σ = 1293905573888. Its totient is φ = 1212909174000.

The previous prime is 1253405252201. The next prime is 1253405252233. The reversal of 1253405252221 is 1222525043521.

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 1253405252221 - 2²³ = 1253396863613 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 (1253405252201) 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, 455070 + ... + 1647391.

It is an arithmetic number, because the mean of its divisors is an integer number (161738196736).

Almost surely, 2^{1253405252221} is an apocalyptic number.

It is an amenable number.

1253405252221 is a deficient number, since it is larger than the sum of its proper divisors (40500321667).

1253405252221 is a wasteful number, since it uses less digits than its factorization.

1253405252221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121723.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 1253405252221 in words is "one trillion, two hundred fifty-three billion, four hundred five million, two hundred fifty-two thousand, two hundred twenty-one".