21333100122 has 12 divisors (see below), whose sum is σ = 46221716970. Its totient is φ = 7111033368.

The previous prime is 21333100111. The next prime is 21333100123. The reversal of 21333100122 is 22100133312.

21333100122 is a `hidden beast` number, since 213 + 331 + 0 + 0 + 122 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19827737721 + 1505362401 = 140811^2 + 38799^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1185172229 = 21333100122 / (2 + 1 + 3 + 3 + 3 + 1 + 0 + 0 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21333100095 and 21333100104.

It is not an unprimeable number, because it can be changed into a prime (21333100123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 592586097 + ... + 592586132.

Almost surely, 2^21333100122 is an apocalyptic number.

21333100122 is an abundant number, since it is smaller than the sum of its proper divisors (24888616848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21333100122 is a wasteful number, since it uses less digits than its factorization.

21333100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185172237 (or 1185172234 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21333100122 its reverse (22100133312), we get a palindrome (43433233434).

The spelling of 21333100122 in words is "twenty-one billion, three hundred thirty-three million, one hundred thousand, one hundred twenty-two".