21101022212 has 24 divisors (see below), whose sum is σ = 37521305472. Its totient is φ = 10381932000.

The previous prime is 21101022209. The next prime is 21101022233. The reversal of 21101022212 is 21222010112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94364 + ... + 226067.

It is an arithmetic number, because the mean of its divisors is an integer number (1563387728).

Almost surely, 2^21101022212 is an apocalyptic number.

It is an amenable number.

21101022212 is a deficient number, since it is larger than the sum of its proper divisors (16420283260).

21101022212 is a wasteful number, since it uses less digits than its factorization.

21101022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320699 (or 320697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21101022212 its reverse (21222010112), we get a palindrome (42323032324).

The spelling of 21101022212 in words is "twenty-one billion, one hundred one million, twenty-two thousand, two hundred twelve".