20221002222121 has 4 divisors (see below), whose sum is σ = 20221013837200. Its totient is φ = 20220990607044.

The previous prime is 20221002222103. The next prime is 20221002222137. The reversal of 20221002222121 is 12122220012202.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221002222121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221002222181) 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, 2608911 + ... + 6873748.

It is an arithmetic number, because the mean of its divisors is an integer number (5055253459300).

Almost surely, 2^{20221002222121} is an apocalyptic number.

It is an amenable number.

20221002222121 is a deficient number, since it is larger than the sum of its proper divisors (11615079).

20221002222121 is an equidigital number, since it uses as much as digits as its factorization.

20221002222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11615078.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20221002222121 its reverse (12122220012202), we get a palindrome (32343222234323).

The spelling of 20221002222121 in words is "twenty trillion, two hundred twenty-one billion, two million, two hundred twenty-two thousand, one hundred twenty-one".