20221111022221 has 4 divisors (see below), whose sum is σ = 20221493623200. Its totient is φ = 20220728421244.

The previous prime is 20221111022207. The next prime is 20221111022239. The reversal of 20221111022221 is 12222011112202.

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 20221111022221 - 2³¹ = 20218963538573 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 (20221111022621) 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, 191221201 + ... + 191326918.

It is an arithmetic number, because the mean of its divisors is an integer number (5055373405800).

Almost surely, 2^{20221111022221} is an apocalyptic number.

It is an amenable number.

20221111022221 is a deficient number, since it is larger than the sum of its proper divisors (382600979).

20221111022221 is an equidigital number, since it uses as much as digits as its factorization.

20221111022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382600978.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20221111022221 its reverse (12222011112202), we get a palindrome (32443122134423).

The spelling of 20221111022221 in words is "twenty trillion, two hundred twenty-one billion, one hundred eleven million, twenty-two thousand, two hundred twenty-one".