20012102021122 has 4 divisors (see below), whose sum is σ = 30018153031686. Its totient is φ = 10006051010560.

The previous prime is 20012102021101. The next prime is 20012102021167. The reversal of 20012102021122 is 22112020121002.

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., 19250498476521 + 761603544601 = 4387539^2 + 872699^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20012102021096 and 20012102021105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003025505279 + ... + 5003025505282.

Almost surely, 2^{20012102021122} is an apocalyptic number.

20012102021122 is a deficient number, since it is larger than the sum of its proper divisors (10006051010564).

20012102021122 is a wasteful number, since it uses less digits than its factorization.

20012102021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006051010563.

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

Adding to 20012102021122 its reverse (22112020121002), we get a palindrome (42124122142124).

The spelling of 20012102021122 in words is "twenty trillion, twelve billion, one hundred two million, twenty-one thousand, one hundred twenty-two".