2101121022222 has 24 divisors (see below), whose sum is σ = 4552486730064. Its totient is φ = 700364774304.

The previous prime is 2101121022191. The next prime is 2101121022239. The reversal of 2101121022222 is 2222201211012.

It is a happy number.

2101121022222 is a `hidden beast` number, since 210 + 1 + 1 + 210 + 22 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2101121022195 and 2101121022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 800938 + ... + 2200850.

It is an arithmetic number, because the mean of its divisors is an integer number (189686947086).

Almost surely, 2^{2101121022222} is an apocalyptic number.

2101121022222 is an abundant number, since it is smaller than the sum of its proper divisors (2451365707842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101121022222 is a wasteful number, since it uses less digits than its factorization.

2101121022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483304 (or 1483301 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2101121022222 its reverse (2222201211012), we get a palindrome (4323322233234).

The spelling of 2101121022222 in words is "two trillion, one hundred one billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-two".