21102022212 has 48 divisors (see below), whose sum is σ = 52932311040. Its totient is φ = 6522010272.

The previous prime is 21102022189. The next prime is 21102022219. The reversal of 21102022212 is 21222020112.

It is a junction number, because it is equal to n+sod(n) for n = 21102022191 and 21102022200.

It is not an unprimeable number, because it can be changed into a prime (21102022219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973888 + ... + 995319.

It is an arithmetic number, because the mean of its divisors is an integer number (1102756480).

Almost surely, 2^21102022212 is an apocalyptic number.

It is an amenable number.

21102022212 is an abundant number, since it is smaller than the sum of its proper divisors (31830288828).

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

21102022212 is a wasteful number, since it uses less digits than its factorization.

21102022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969280 (or 1969278 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21102022212 its reverse (21222020112), we get a palindrome (42324042324).

The spelling of 21102022212 in words is "twenty-one billion, one hundred two million, twenty-two thousand, two hundred twelve".