1222121200122 has 96 divisors (see below), whose sum is σ = 2778730935552. Its totient is φ = 387738410112.

The previous prime is 1222121200117. The next prime is 1222121200127. The reversal of 1222121200122 is 2210021212221.

It is a happy number.

1222121200122 is a `hidden beast` number, since 1 + 222 + 121 + 200 + 122 = 666.

It is an interprime number because it is at equal distance from previous prime (1222121200117) and next prime (1222121200127).

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 = 1222121200095 and 1222121200104.

It is not an unprimeable number, because it can be changed into a prime (1222121200127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71766973 + ... + 71783999.

It is an arithmetic number, because the mean of its divisors is an integer number (28945113912).

Almost surely, 2^{1222121200122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222121200122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389365467776).

1222121200122 is an abundant number, since it is smaller than the sum of its proper divisors (1556609735430).

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

1222121200122 is a wasteful number, since it uses less digits than its factorization.

1222121200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19412 (or 19409 counting only the distinct ones).

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

Adding to 1222121200122 its reverse (2210021212221), we get a palindrome (3432142412343).

The spelling of 1222121200122 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-two".