21122333011 has 24 divisors (see below), whose sum is σ = 23648495616. Its totient is φ = 18837767520.

The previous prime is 21122332999. The next prime is 21122333033. The reversal of 21122333011 is 11033322112.

It is not a de Polignac number, because 21122333011 - 2²³ = 21113944403 is a prime.

It is a super-2 number, since 2×21122333011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21122333011.

It is not an unprimeable number, because it can be changed into a prime (21122333081) 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, 3575286 + ... + 3581188.

It is an arithmetic number, because the mean of its divisors is an integer number (985353984).

Almost surely, 2^21122333011 is an apocalyptic number.

21122333011 is a deficient number, since it is larger than the sum of its proper divisors (2526162605).

21122333011 is a wasteful number, since it uses less digits than its factorization.

21122333011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6643 (or 6630 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21122333011 its reverse (11033322112), we get a palindrome (32155655123).

The spelling of 21122333011 in words is "twenty-one billion, one hundred twenty-two million, three hundred thirty-three thousand, eleven".