2102200120121 has 2 divisors, whose sum is σ = 2102200120122. Its totient is φ = 2102200120120.

The previous prime is 2102200120099. The next prime is 2102200120133. The reversal of 2102200120121 is 1210210022012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1083554001721 + 1018646118400 = 1040939^2 + 1009280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102200120121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102200120096 and 2102200120105.

It is not a weakly prime, because it can be changed into another prime (2102200125121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051100060060 + 1051100060061.

It is an arithmetic number, because the mean of its divisors is an integer number (1051100060061).

Almost surely, 2^{2102200120121} is an apocalyptic number.

It is an amenable number.

2102200120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102200120121 is an equidigital number, since it uses as much as digits as its factorization.

2102200120121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2102200120121 its reverse (1210210022012), we get a palindrome (3312410142133).

The spelling of 2102200120121 in words is "two trillion, one hundred two billion, two hundred million, one hundred twenty thousand, one hundred twenty-one".