421421232253451 has 16 divisors (see below), whose sum is σ = 447651611035200. Its totient is φ = 395350987822080.

The previous prime is 421421232253433. The next prime is 421421232253453. The reversal of 421421232253451 is 154352232124124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 421421232253451 - 2⁶ = 421421232253387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421421232253399 and 421421232253408.

It is not an unprimeable number, because it can be changed into a prime (421421232253453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415310525 + ... + 416324001.

It is an arithmetic number, because the mean of its divisors is an integer number (27978225689700).

Almost surely, 2^{421421232253451} is an apocalyptic number.

421421232253451 is a deficient number, since it is larger than the sum of its proper divisors (26230378781749).

421421232253451 is a wasteful number, since it uses less digits than its factorization.

421421232253451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092454.

The product of its digits is 460800, while the sum is 41.

Adding to 421421232253451 its reverse (154352232124124), we get a palindrome (575773464377575).

The spelling of 421421232253451 in words is "four hundred twenty-one trillion, four hundred twenty-one billion, two hundred thirty-two million, two hundred fifty-three thousand, four hundred fifty-one".