2102101213 has 2 divisors, whose sum is σ = 2102101214. Its totient is φ = 2102101212.

The previous prime is 2102101117. The next prime is 2102101219. The reversal of 2102101213 is 3121012012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1960895524 + 141205689 = 44282^2 + 11883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102101213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102101193 and 2102101202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102101219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051050606 + 1051050607.

It is an arithmetic number, because the mean of its divisors is an integer number (1051050607).

Almost surely, 2^2102101213 is an apocalyptic number.

It is an amenable number.

2102101213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102101213 is an equidigital number, since it uses as much as digits as its factorization.

2102101213 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 13.

The square root of 2102101213 is about 45848.6773309765. The cubic root of 2102101213 is about 1281.0061288996.

Adding to 2102101213 its reverse (3121012012), we get a palindrome (5223113225).

The spelling of 2102101213 in words is "two billion, one hundred two million, one hundred one thousand, two hundred thirteen".