21222100311 has 24 divisors (see below), whose sum is σ = 29790238320. Its totient is φ = 13433247360.

The previous prime is 21222100301. The next prime is 21222100349. The reversal of 21222100311 is 11300122212.

It is not a de Polignac number, because 21222100311 - 2⁷ = 21222100183 is a prime.

It is a super-2 number, since 2×21222100311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222100301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83355 + ... + 222243.

It is an arithmetic number, because the mean of its divisors is an integer number (1241259930).

Almost surely, 2^21222100311 is an apocalyptic number.

21222100311 is a deficient number, since it is larger than the sum of its proper divisors (8568138009).

21222100311 is a wasteful number, since it uses less digits than its factorization.

21222100311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139007 (or 138976 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21222100311 its reverse (11300122212), we get a palindrome (32522222523).

The spelling of 21222100311 in words is "twenty-one billion, two hundred twenty-two million, one hundred thousand, three hundred eleven".