20112222122 has 4 divisors (see below), whose sum is σ = 30168333186. Its totient is φ = 10056111060.

The previous prime is 20112222089. The next prime is 20112222149. The reversal of 20112222122 is 22122221102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11631838201 + 8480383921 = 107851^2 + 92089^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20112222122.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5028055529 + ... + 5028055532.

Almost surely, 2^20112222122 is an apocalyptic number.

20112222122 is a deficient number, since it is larger than the sum of its proper divisors (10056111064).

20112222122 is a wasteful number, since it uses less digits than its factorization.

20112222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10056111063.

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

Adding to 20112222122 its reverse (22122221102), we get a palindrome (42234443224).

The spelling of 20112222122 in words is "twenty billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twenty-two".