421311252221257 has 8 divisors (see below), whose sum is σ = 439764029772480. Its totient is φ = 402869716088400.

The previous prime is 421311252221219. The next prime is 421311252221351. The reversal of 421311252221257 is 752122252113124.

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-421311252221257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421311252221207) 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, 2810277994 + ... + 2810427907.

It is an arithmetic number, because the mean of its divisors is an integer number (54970503721560).

Almost surely, 2^{421311252221257} is an apocalyptic number.

It is an amenable number.

421311252221257 is a deficient number, since it is larger than the sum of its proper divisors (18452777551223).

421311252221257 is a wasteful number, since it uses less digits than its factorization.

421311252221257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5620709183.

The product of its digits is 134400, while the sum is 40.

The spelling of 421311252221257 in words is "four hundred twenty-one trillion, three hundred eleven billion, two hundred fifty-two million, two hundred twenty-one thousand, two hundred fifty-seven".