20221100021111 has 4 divisors (see below), whose sum is σ = 22059381841224. Its totient is φ = 18382818201000.

The previous prime is 20221100021071. The next prime is 20221100021149. The reversal of 20221100021111 is 11112000112202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20221100021111 - 2²⁶ = 20221032912247 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 (20221100011111) 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, 919140910040 + ... + 919140910061.

It is an arithmetic number, because the mean of its divisors is an integer number (5514845460306).

Almost surely, 2^{20221100021111} is an apocalyptic number.

20221100021111 is a deficient number, since it is larger than the sum of its proper divisors (1838281820113).

20221100021111 is a wasteful number, since it uses less digits than its factorization.

20221100021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838281820112.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20221100021111 its reverse (11112000112202), we get a palindrome (31333100133313).

The spelling of 20221100021111 in words is "twenty trillion, two hundred twenty-one billion, one hundred million, twenty-one thousand, one hundred eleven".