2101210968949 has 2 divisors, whose sum is σ = 2101210968950. Its totient is φ = 2101210968948.

The previous prime is 2101210968947. The next prime is 2101210968971. The reversal of 2101210968949 is 9498690121012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1217065684849 + 884145284100 = 1103207^2 + 940290^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101210968949 - 2¹ = 2101210968947 is a prime.

Together with 2101210968947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2101210968896 and 2101210968905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101210968947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050605484474 + 1050605484475.

It is an arithmetic number, because the mean of its divisors is an integer number (1050605484475).

Almost surely, 2^{2101210968949} is an apocalyptic number.

It is an amenable number.

2101210968949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101210968949 is an equidigital number, since it uses as much as digits as its factorization.

2101210968949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 2101210968949 in words is "two trillion, one hundred one billion, two hundred ten million, nine hundred sixty-eight thousand, nine hundred forty-nine".