2120101012121 has 4 divisors (see below), whose sum is σ = 2123593765632. Its totient is φ = 2116608258612.

The previous prime is 2120101012093. The next prime is 2120101012129. The reversal of 2120101012121 is 1212101010212.

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 2120101012121 - 2²⁶ = 2120033903257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120101012096 and 2120101012105.

It is not an unprimeable number, because it can be changed into a prime (2120101012129) 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, 1746375845 + ... + 1746377058.

It is an arithmetic number, because the mean of its divisors is an integer number (530898441408).

Almost surely, 2^{2120101012121} is an apocalyptic number.

It is an amenable number.

2120101012121 is a deficient number, since it is larger than the sum of its proper divisors (3492753511).

2120101012121 is an equidigital number, since it uses as much as digits as its factorization.

2120101012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492753510.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2120101012121 its reverse (1212101010212), we get a palindrome (3332202022333).

The spelling of 2120101012121 in words is "two trillion, one hundred twenty billion, one hundred one million, twelve thousand, one hundred twenty-one".