2121200122122 has 32 divisors (see below), whose sum is σ = 4713878203200. Its totient is φ = 707051684304.

The previous prime is 2121200122117. The next prime is 2121200122127. The reversal of 2121200122122 is 2212210021212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121200122117) and next prime (2121200122127).

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 = 2121200122095 and 2121200122104.

It is not an unprimeable number, because it can be changed into a prime (2121200122127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2311453 + ... + 3095999.

It is an arithmetic number, because the mean of its divisors is an integer number (147308693850).

Almost surely, 2^{2121200122122} is an apocalyptic number.

2121200122122 is an abundant number, since it is smaller than the sum of its proper divisors (2592678081078).

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

2121200122122 is a wasteful number, since it uses less digits than its factorization.

2121200122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834627 (or 834621 counting only the distinct ones).

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

Adding to 2121200122122 its reverse (2212210021212), we get a palindrome (4333410143334).

The spelling of 2121200122122 in words is "two trillion, one hundred twenty-one billion, two hundred million, one hundred twenty-two thousand, one hundred twenty-two".