20021110122122 has 4 divisors (see below), whose sum is σ = 30031665183186. Its totient is φ = 10010555061060.

The previous prime is 20021110122073. The next prime is 20021110122137. The reversal of 20021110122122 is 22122101112002.

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., 15827260765801 + 4193849356321 = 3978349^2 + 2047889^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20021110122122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005277530529 + ... + 5005277530532.

Almost surely, 2^{20021110122122} is an apocalyptic number.

20021110122122 is a deficient number, since it is larger than the sum of its proper divisors (10010555061064).

20021110122122 is a wasteful number, since it uses less digits than its factorization.

20021110122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010555061063.

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

Adding to 20021110122122 its reverse (22122101112002), we get a palindrome (42143211234124).

The spelling of 20021110122122 in words is "twenty trillion, twenty-one billion, one hundred ten million, one hundred twenty-two thousand, one hundred twenty-two".