20021112120122 has 4 divisors (see below), whose sum is σ = 30031668180186. Its totient is φ = 10010556060060.

The previous prime is 20021112120017. The next prime is 20021112120137. The reversal of 20021112120122 is 22102121112002.

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., 20019441027481 + 1671092641 = 4474309^2 + 40879^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20021112120122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005278030029 + ... + 5005278030032.

Almost surely, 2^{20021112120122} is an apocalyptic number.

20021112120122 is a deficient number, since it is larger than the sum of its proper divisors (10010556060064).

20021112120122 is a wasteful number, since it uses less digits than its factorization.

20021112120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010556060063.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20021112120122 its reverse (22102121112002), we get a palindrome (42123233232124).

The spelling of 20021112120122 in words is "twenty trillion, twenty-one billion, one hundred twelve million, one hundred twenty thousand, one hundred twenty-two".