2221212100122 has 24 divisors (see below), whose sum is σ = 4816448844480. Its totient is φ = 739815936840.

The previous prime is 2221212100109. The next prime is 2221212100139. The reversal of 2221212100122 is 2210012121222.

It is a happy number.

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 = 2221212100095 and 2221212100104.

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, 48984754 + ... + 49030077.

It is an arithmetic number, because the mean of its divisors is an integer number (200685368520).

Almost surely, 2^{2221212100122} is an apocalyptic number.

2221212100122 is an abundant number, since it is smaller than the sum of its proper divisors (2595236744358).

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

2221212100122 is a wasteful number, since it uses less digits than its factorization.

2221212100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98016098 (or 98016095 counting only the distinct ones).

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

Adding to 2221212100122 its reverse (2210012121222), we get a palindrome (4431224221344).

The spelling of 2221212100122 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, one hundred thousand, one hundred twenty-two".