22001021211 has 16 divisors (see below), whose sum is σ = 31599975680. Its totient is φ = 13535333280.

The previous prime is 22001021173. The next prime is 22001021213. The reversal of 22001021211 is 11212010022.

It is not a de Polignac number, because 22001021211 - 2¹⁷ = 22000890139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22001021213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67530 + ... + 220368.

It is an arithmetic number, because the mean of its divisors is an integer number (1974998480).

Almost surely, 2^22001021211 is an apocalyptic number.

22001021211 is a deficient number, since it is larger than the sum of its proper divisors (9598954469).

22001021211 is a wasteful number, since it uses less digits than its factorization.

22001021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156546.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22001021211 its reverse (11212010022), we get a palindrome (33213031233).

The spelling of 22001021211 in words is "twenty-two billion, one million, twenty-one thousand, two hundred eleven".