20221020212111 has 4 divisors (see below), whose sum is σ = 21410491989312. Its totient is φ = 19031548434912.

The previous prime is 20221020212101. The next prime is 20221020212137. The reversal of 20221020212111 is 11121202012202.

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

It is a cyclic number.

It is not a de Polignac number, because 20221020212111 - 2³⁰ = 20219946470287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1189471777183 = 20221020212111 / (2 + 0 + 2 + 2 + 1 + 0 + 2 + 0 + 2 + 1 + 2 + 1 + 1 + 1).

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 20221020212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221020212101) 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, 594735888575 + ... + 594735888608.

It is an arithmetic number, because the mean of its divisors is an integer number (5352622997328).

Almost surely, 2^{20221020212111} is an apocalyptic number.

20221020212111 is a deficient number, since it is larger than the sum of its proper divisors (1189471777201).

20221020212111 is a wasteful number, since it uses less digits than its factorization.

20221020212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189471777200.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20221020212111 its reverse (11121202012202), we get a palindrome (31342222224313).

The spelling of 20221020212111 in words is "twenty trillion, two hundred twenty-one billion, twenty million, two hundred twelve thousand, one hundred eleven".