2021020122122 has 4 divisors (see below), whose sum is σ = 3031530183186. Its totient is φ = 1010510061060.

The previous prime is 2021020122101. The next prime is 2021020122203. The reversal of 2021020122122 is 2212210201202.

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., 1747105011961 + 273915110161 = 1321781^2 + 523369^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2021020122122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505255030529 + ... + 505255030532.

Almost surely, 2^{2021020122122} is an apocalyptic number.

2021020122122 is a deficient number, since it is larger than the sum of its proper divisors (1010510061064).

2021020122122 is a wasteful number, since it uses less digits than its factorization.

2021020122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010510061063.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2021020122122 its reverse (2212210201202), we get a palindrome (4233230323324).

The spelling of 2021020122122 in words is "two trillion, twenty-one billion, twenty million, one hundred twenty-two thousand, one hundred twenty-two".