220020120122021 has 4 divisors (see below), whose sum is σ = 220022596715712. Its totient is φ = 220017643528332.

The previous prime is 220020120121951. The next prime is 220020120122029. The reversal of 220020120122021 is 120221021020022.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 220020120122021 - 2⁴² = 215622073610917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020120122029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238163581 + ... + 1238341266.

It is an arithmetic number, because the mean of its divisors is an integer number (55005649178928).

Almost surely, 2^{220020120122021} is an apocalyptic number.

It is an amenable number.

220020120122021 is a deficient number, since it is larger than the sum of its proper divisors (2476593691).

220020120122021 is an equidigital number, since it uses as much as digits as its factorization.

220020120122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476593690.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 220020120122021 its reverse (120221021020022), we get a palindrome (340241141142043).

The spelling of 220020120122021 in words is "two hundred twenty trillion, twenty billion, one hundred twenty million, one hundred twenty-two thousand, twenty-one".