2100101869949 has 2 divisors, whose sum is σ = 2100101869950. Its totient is φ = 2100101869948.

The previous prime is 2100101869939. The next prime is 2100101869951. The reversal of 2100101869949 is 9499681010012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1728620152900 + 371481717049 = 1314770^2 + 609493^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100101869949 - 2³² = 2095806902653 is a prime.

Together with 2100101869951, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100101869897 and 2100101869906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100101869939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050050934974 + 1050050934975.

It is an arithmetic number, because the mean of its divisors is an integer number (1050050934975).

Almost surely, 2^{2100101869949} is an apocalyptic number.

It is an amenable number.

2100101869949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100101869949 is an equidigital number, since it uses as much as digits as its factorization.

2100101869949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 50.

The spelling of 2100101869949 in words is "two trillion, one hundred billion, one hundred one million, eight hundred sixty-nine thousand, nine hundred forty-nine".