2120122202121 has 128 divisors (see below), whose sum is σ = 4364532633600. Its totient is φ = 982019220480.

The previous prime is 2120122202111. The next prime is 2120122202123. The reversal of 2120122202121 is 1212022210212.

It is a happy number.

It is not a de Polignac number, because 2120122202121 - 2¹⁴ = 2120122185737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2120122202094 and 2120122202103.

It is not an unprimeable number, because it can be changed into a prime (2120122202123) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 907090 + ... + 2250123.

It is an arithmetic number, because the mean of its divisors is an integer number (34097911200).

Almost surely, 2^{2120122202121} is an apocalyptic number.

2120122202121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2120122202121 is an abundant number, since it is smaller than the sum of its proper divisors (2244410431479).

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

2120122202121 is a wasteful number, since it uses less digits than its factorization.

2120122202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157276 (or 3157270 counting only the distinct ones).

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

Adding to 2120122202121 its reverse (1212022210212), we get a palindrome (3332144412333).

The spelling of 2120122202121 in words is "two trillion, one hundred twenty billion, one hundred twenty-two million, two hundred two thousand, one hundred twenty-one".