20022210220121 has 4 divisors (see below), whose sum is σ = 20022555947472. Its totient is φ = 20021864492772.

The previous prime is 20022210220099. The next prime is 20022210220153. The reversal of 20022210220121 is 12102201222002.

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 a de Polignac number, because none of the positive numbers 2^k-20022210220121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20022210220121.

It is not an unprimeable number, because it can be changed into a prime (20022210220171) 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, 172776791 + ... + 172892636.

It is an arithmetic number, because the mean of its divisors is an integer number (5005638986868).

Almost surely, 2^{20022210220121} is an apocalyptic number.

It is an amenable number.

20022210220121 is a deficient number, since it is larger than the sum of its proper divisors (345727351).

20022210220121 is an equidigital number, since it uses as much as digits as its factorization.

20022210220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345727350.

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

Adding to 20022210220121 its reverse (12102201222002), we get a palindrome (32124411442123).

The spelling of 20022210220121 in words is "twenty trillion, twenty-two billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-one".