20022220101021 has 4 divisors (see below), whose sum is σ = 26696293468032. Its totient is φ = 13348146734012.

The previous prime is 20022220101019. The next prime is 20022220101067. The reversal of 20022220101021 is 12010102222002.

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 20022220101021 - 2¹ = 20022220101019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022220101721) 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, 3337036683501 + ... + 3337036683506.

It is an arithmetic number, because the mean of its divisors is an integer number (6674073367008).

Almost surely, 2^{20022220101021} is an apocalyptic number.

It is an amenable number.

20022220101021 is a deficient number, since it is larger than the sum of its proper divisors (6674073367011).

20022220101021 is an equidigital number, since it uses as much as digits as its factorization.

20022220101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674073367010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20022220101021 its reverse (12010102222002), we get a palindrome (32032322323023).

The spelling of 20022220101021 in words is "twenty trillion, twenty-two billion, two hundred twenty million, one hundred one thousand, twenty-one".