20221121111 has 8 divisors (see below), whose sum is σ = 20636294400. Its totient is φ = 19807193952.

The previous prime is 20221121101. The next prime is 20221121113. The reversal of 20221121111 is 11112112202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20221121111 - 2¹⁸ = 20220858967 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 (20221121113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278711 + ... + 343688.

It is an arithmetic number, because the mean of its divisors is an integer number (2579536800).

Almost surely, 2^20221121111 is an apocalyptic number.

20221121111 is a deficient number, since it is larger than the sum of its proper divisors (415173289).

20221121111 is an equidigital number, since it uses as much as digits as its factorization.

20221121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623065.

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

Adding to 20221121111 its reverse (11112112202), we get a palindrome (31333233313).

It can be divided in two parts, 202211 and 21111, that added together give a palindrome (223322).

The spelling of 20221121111 in words is "twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred eleven".