20021120102122 has 4 divisors (see below), whose sum is σ = 30031680153186. Its totient is φ = 10010560051060.

The previous prime is 20021120102083. The next prime is 20021120102147. The reversal of 20021120102122 is 22120102112002.

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., 10393137897921 + 9627982204201 = 3223839^2 + 3102899^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021120102096 and 20021120102105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005280025529 + ... + 5005280025532.

Almost surely, 2^{20021120102122} is an apocalyptic number.

20021120102122 is a deficient number, since it is larger than the sum of its proper divisors (10010560051064).

20021120102122 is a wasteful number, since it uses less digits than its factorization.

20021120102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010560051063.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021120102122 its reverse (22120102112002), we get a palindrome (42141222214124).

The spelling of 20021120102122 in words is "twenty trillion, twenty-one billion, one hundred twenty million, one hundred two thousand, one hundred twenty-two".