21222211212022 has 4 divisors (see below), whose sum is σ = 31833316818036. Its totient is φ = 10611105606010.

The previous prime is 21222211212001. The next prime is 21222211212023. The reversal of 21222211212022 is 22021211222212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21222211211984 and 21222211212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222211212023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305552803004 + ... + 5305552803007.

It is an arithmetic number, because the mean of its divisors is an integer number (7958329204509).

Almost surely, 2^{21222211212022} is an apocalyptic number.

21222211212022 is a deficient number, since it is larger than the sum of its proper divisors (10611105606014).

21222211212022 is a wasteful number, since it uses less digits than its factorization.

21222211212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611105606013.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21222211212022 its reverse (22021211222212), we get a palindrome (43243422434234).

The spelling of 21222211212022 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred twelve thousand, twenty-two".