21222221211122 has 8 divisors (see below), whose sum is σ = 32931032913900. Its totient is φ = 10245210239824.

The previous prime is 21222221211101. The next prime is 21222221211187. The reversal of 21222221211122 is 22111212222212.

It can be written as a sum of positive squares in 2 ways, for example, as 19814151813481 + 1408069397641 = 4451309^2 + 1186621^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182950182797 + ... + 182950182912.

Almost surely, 2^{21222221211122} is an apocalyptic number.

21222221211122 is a deficient number, since it is larger than the sum of its proper divisors (11708811702778).

21222221211122 is a wasteful number, since it uses less digits than its factorization.

21222221211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365900365740.

The product of its digits is 512, while the sum is 23.

Adding to 21222221211122 its reverse (22111212222212), we get a palindrome (43333433433334).

The spelling of 21222221211122 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-two".