202321453421 has 4 divisors (see below), whose sum is σ = 202331103744. Its totient is φ = 202311803100.

The previous prime is 202321453379. The next prime is 202321453423. The reversal of 202321453421 is 124354123202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124354123202 = 2 ⋅62177061601.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202321453421 is a prime.

It is a super-5 number, since 5×202321453421⁵ (a number of 58 digits) contains 55555 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 (202321453423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4793645 + ... + 4835666.

It is an arithmetic number, because the mean of its divisors is an integer number (50582775936).

Almost surely, 2^202321453421 is an apocalyptic number.

It is an amenable number.

202321453421 is a deficient number, since it is larger than the sum of its proper divisors (9650323).

202321453421 is an equidigital number, since it uses as much as digits as its factorization.

202321453421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650322.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 202321453421 its reverse (124354123202), we get a palindrome (326675576623).

The spelling of 202321453421 in words is "two hundred two billion, three hundred twenty-one million, four hundred fifty-three thousand, four hundred twenty-one".