20222222212 has 12 divisors (see below), whose sum is σ = 36252032796. Its totient is φ = 9864498560.

The previous prime is 20222222113. The next prime is 20222222213. The reversal of 20222222212 is 21222222202.

It can be written as a sum of positive squares in 2 ways, for example, as 11093566276 + 9128655936 = 105326^2 + 95544^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20222222212.

It is not an unprimeable number, because it can be changed into a prime (20222222213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61652953 + ... + 61653280.

It is an arithmetic number, because the mean of its divisors is an integer number (3021002733).

Almost surely, 2^20222222212 is an apocalyptic number.

It is an amenable number.

20222222212 is a deficient number, since it is larger than the sum of its proper divisors (16029810584).

20222222212 is a wasteful number, since it uses less digits than its factorization.

20222222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123306278 (or 123306276 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 20222222212 its reverse (21222222202), we get a palindrome (41444444414).

The spelling of 20222222212 in words is "twenty billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twelve".