21100223322 has 48 divisors (see below), whose sum is σ = 48994208640. Its totient is φ = 6545775456.

The previous prime is 21100223237. The next prime is 21100223363. The reversal of 21100223322 is 22332200112.

21100223322 is a `hidden beast` number, since 21 + 100 + 223 + 322 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21100223295 and 21100223304.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 673422 + ... + 704057.

It is an arithmetic number, because the mean of its divisors is an integer number (1020712680).

Almost surely, 2^21100223322 is an apocalyptic number.

21100223322 is an abundant number, since it is smaller than the sum of its proper divisors (27893985318).

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

21100223322 is a wasteful number, since it uses less digits than its factorization.

21100223322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377547 (or 1377544 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21100223322 its reverse (22332200112), we get a palindrome (43432423434).

The spelling of 21100223322 in words is "twenty-one billion, one hundred million, two hundred twenty-three thousand, three hundred twenty-two".