20021111122 has 4 divisors (see below), whose sum is σ = 30031666686. Its totient is φ = 10010555560.

The previous prime is 20021111119. The next prime is 20021111141. The reversal of 20021111122 is 22111112002.

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., 16342809921 + 3678301201 = 127839^2 + 60649^2 .

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, 5005277779 + ... + 5005277782.

Almost surely, 2^20021111122 is an apocalyptic number.

20021111122 is a deficient number, since it is larger than the sum of its proper divisors (10010555564).

20021111122 is a wasteful number, since it uses less digits than its factorization.

20021111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010555563.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021111122 its reverse (22111112002), we get a palindrome (42132223124).

The spelling of 20021111122 in words is "twenty billion, twenty-one million, one hundred eleven thousand, one hundred twenty-two".