20021111112122 has 4 divisors (see below), whose sum is σ = 30031666668186. Its totient is φ = 10010555556060.

The previous prime is 20021111112083. The next prime is 20021111112131. The reversal of 20021111112122 is 22121111112002.

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., 18813290330041 + 1207820782081 = 4337429^2 + 1099009^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20021111112122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005277778029 + ... + 5005277778032.

Almost surely, 2^{20021111112122} is an apocalyptic number.

20021111112122 is a deficient number, since it is larger than the sum of its proper divisors (10010555556064).

20021111112122 is a wasteful number, since it uses less digits than its factorization.

20021111112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010555556063.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20021111112122 its reverse (22121111112002), we get a palindrome (42142222224124).

The spelling of 20021111112122 in words is "twenty trillion, twenty-one billion, one hundred eleven million, one hundred twelve thousand, one hundred twenty-two".