2100110021213 has 2 divisors, whose sum is σ = 2100110021214. Its totient is φ = 2100110021212.

The previous prime is 2100110021159. The next prime is 2100110021249. The reversal of 2100110021213 is 3121200110012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1616310480964 + 483799540249 = 1271342^2 + 695557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100110021213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100110021813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050055010606 + 1050055010607.

It is an arithmetic number, because the mean of its divisors is an integer number (1050055010607).

Almost surely, 2^{2100110021213} is an apocalyptic number.

It is an amenable number.

2100110021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100110021213 is an equidigital number, since it uses as much as digits as its factorization.

2100110021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 2100110021213 its reverse (3121200110012), we get a palindrome (5221310131225).

The spelling of 2100110021213 in words is "two trillion, one hundred billion, one hundred ten million, twenty-one thousand, two hundred thirteen".