220365532421 has 4 divisors (see below), whose sum is σ = 220372611552. Its totient is φ = 220358453292.

The previous prime is 220365532417. The next prime is 220365532441. The reversal of 220365532421 is 124235563022.

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: 124235563022 = 2 ⋅62117781511.

It is a cyclic number.

It is not a de Polignac number, because 220365532421 - 2² = 220365532417 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 (220365532411) 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, 3492665 + ... + 3555198.

It is an arithmetic number, because the mean of its divisors is an integer number (55093152888).

Almost surely, 2^220365532421 is an apocalyptic number.

It is an amenable number.

220365532421 is a deficient number, since it is larger than the sum of its proper divisors (7079131).

220365532421 is an equidigital number, since it uses as much as digits as its factorization.

220365532421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7079130.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 220365532421 in words is "two hundred twenty billion, three hundred sixty-five million, five hundred thirty-two thousand, four hundred twenty-one".