2102120022121 has 4 divisors (see below), whose sum is σ = 2402422882432. Its totient is φ = 1801817161812.

The previous prime is 2102120022029. The next prime is 2102120022139. The reversal of 2102120022121 is 1212200212012.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-2102120022121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102120022095 and 2102120022104.

It is not an unprimeable number, because it can be changed into a prime (2102120322121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150151430145 + ... + 150151430158.

It is an arithmetic number, because the mean of its divisors is an integer number (600605720608).

Almost surely, 2^{2102120022121} is an apocalyptic number.

It is an amenable number.

2102120022121 is a deficient number, since it is larger than the sum of its proper divisors (300302860311).

2102120022121 is an equidigital number, since it uses as much as digits as its factorization.

2102120022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300302860310.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2102120022121 its reverse (1212200212012), we get a palindrome (3314320234133).

The spelling of 2102120022121 in words is "two trillion, one hundred two billion, one hundred twenty million, twenty-two thousand, one hundred twenty-one".