2121122120121 has 40 divisors (see below), whose sum is σ = 3189966683904. Its totient is φ = 1404560334240.

The previous prime is 2121122120119. The next prime is 2121122120197. The reversal of 2121122120121 is 1210212211212.

2121122120121 is a `hidden beast` number, since 212 + 11 + 221 + 201 + 21 = 666.

It is not a de Polignac number, because 2121122120121 - 2¹ = 2121122120119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121122120094 and 2121122120103.

It is not an unprimeable number, because it can be changed into a prime (2121122120101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12037176 + ... + 12212118.

Almost surely, 2^{2121122120121} is an apocalyptic number.

It is an amenable number.

2121122120121 is a deficient number, since it is larger than the sum of its proper divisors (1068844563783).

2121122120121 is a wasteful number, since it uses less digits than its factorization.

2121122120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175963 (or 175954 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2121122120121 its reverse (1210212211212), we get a palindrome (3331334331333).

The spelling of 2121122120121 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, one hundred twenty-one".