2101220112122 has 16 divisors (see below), whose sum is σ = 3337596724392. Its totient is φ = 988701381120.

The previous prime is 2101220112091. The next prime is 2101220112133. The reversal of 2101220112122 is 2212110221012.

It can be written as a sum of positive squares in 4 ways, for example, as 1450389071041 + 650831041081 = 1204321^2 + 806741^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 2101220112122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3061553 + ... + 3684500.

Almost surely, 2^{2101220112122} is an apocalyptic number.

2101220112122 is a deficient number, since it is larger than the sum of its proper divisors (1236376612270).

2101220112122 is a wasteful number, since it uses less digits than its factorization.

2101220112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755233.

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

Adding to 2101220112122 its reverse (2212110221012), we get a palindrome (4313330333134).

The spelling of 2101220112122 in words is "two trillion, one hundred one billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-two".