22021010212 has 6 divisors (see below), whose sum is σ = 38536767878. Its totient is φ = 11010505104.

The previous prime is 22021010189. The next prime is 22021010233. The reversal of 22021010212 is 21201012022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20674413796 + 1346596416 = 143786^2 + 36696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22021010192 and 22021010201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752626273 + ... + 2752626280.

Almost surely, 2^22021010212 is an apocalyptic number.

It is an amenable number.

22021010212 is a deficient number, since it is larger than the sum of its proper divisors (16515757666).

22021010212 is a wasteful number, since it uses less digits than its factorization.

22021010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505252557 (or 5505252555 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22021010212 its reverse (21201012022), we get a palindrome (43222022234).

The spelling of 22021010212 in words is "twenty-two billion, twenty-one million, ten thousand, two hundred twelve".