22211022212 has 6 divisors (see below), whose sum is σ = 38869288878. Its totient is φ = 11105511104.

The previous prime is 22211022181. The next prime is 22211022221. The reversal of 22211022212 is 21222011222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22208152576 + 2869636 = 149024^2 + 1694^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2776377773 + ... + 2776377780.

It is an arithmetic number, because the mean of its divisors is an integer number (6478214813).

Almost surely, 2^22211022212 is an apocalyptic number.

It is an amenable number.

22211022212 is a deficient number, since it is larger than the sum of its proper divisors (16658266666).

22211022212 is a wasteful number, since it uses less digits than its factorization.

22211022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552755557 (or 5552755555 counting only the distinct ones).

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

Adding to 22211022212 its reverse (21222011222), we get a palindrome (43433033434).

The spelling of 22211022212 in words is "twenty-two billion, two hundred eleven million, twenty-two thousand, two hundred twelve".