21210222221122 has 32 divisors (see below), whose sum is σ = 35510234306688. Its totient is φ = 9420159600000.

The previous prime is 21210222221119. The next prime is 21210222221143. The reversal of 21210222221122 is 22112222201212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21210222221093 and 21210222221102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52131579 + ... + 52536862.

It is an arithmetic number, because the mean of its divisors is an integer number (1109694822084).

Almost surely, 2^{21210222221122} is an apocalyptic number.

21210222221122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210222221122 is a deficient number, since it is larger than the sum of its proper divisors (14300012085566).

21210222221122 is a wasteful number, since it uses less digits than its factorization.

21210222221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104668666.

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

Adding to 21210222221122 its reverse (22112222201212), we get a palindrome (43322444422334).

The spelling of 21210222221122 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-two".