2120210121121 has 4 divisors (see below), whose sum is σ = 2147048224000. Its totient is φ = 2093372018244.

The previous prime is 2120210121119. The next prime is 2120210121143. The reversal of 2120210121121 is 1211210120212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2120210121121 - 2¹ = 2120210121119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120210121095 and 2120210121104.

It is not an unprimeable number, because it can be changed into a prime (2120210121101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13419051321 + ... + 13419051478.

It is an arithmetic number, because the mean of its divisors is an integer number (536762056000).

Almost surely, 2^{2120210121121} is an apocalyptic number.

It is an amenable number.

2120210121121 is a deficient number, since it is larger than the sum of its proper divisors (26838102879).

2120210121121 is an equidigital number, since it uses as much as digits as its factorization.

2120210121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26838102878.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2120210121121 its reverse (1211210120212), we get a palindrome (3331420241333).

Subtracting from 2120210121121 its reverse (1211210120212), we obtain a palindrome (909000000909).

The spelling of 2120210121121 in words is "two trillion, one hundred twenty billion, two hundred ten million, one hundred twenty-one thousand, one hundred twenty-one".