21122022212 has 12 divisors (see below), whose sum is σ = 37126375440. Its totient is φ = 10514486376.

The previous prime is 21122022191. The next prime is 21122022223. The reversal of 21122022212 is 21222022112.

It is a happy number.

It is a super-2 number, since 2×21122022212² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11630162 + ... + 11631977.

It is an arithmetic number, because the mean of its divisors is an integer number (3093864620).

Almost surely, 2^21122022212 is an apocalyptic number.

It is an amenable number.

21122022212 is a deficient number, since it is larger than the sum of its proper divisors (16004353228).

21122022212 is a wasteful number, since it uses less digits than its factorization.

21122022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23262370 (or 23262368 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21122022212 its reverse (21222022112), we get a palindrome (42344044324).

The spelling of 21122022212 in words is "twenty-one billion, one hundred twenty-two million, twenty-two thousand, two hundred twelve".