210100100121979 has 2 divisors, whose sum is σ = 210100100121980. Its totient is φ = 210100100121978.

The previous prime is 210100100121959. The next prime is 210100100122019. The reversal of 210100100121979 is 979121001001012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210100100121979 is a prime.

It is not a weakly prime, because it can be changed into another prime (210100100121959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050050060989 + 105050050060990.

It is an arithmetic number, because the mean of its divisors is an integer number (105050050060990).

Almost surely, 2^{210100100121979} is an apocalyptic number.

210100100121979 is a deficient number, since it is larger than the sum of its proper divisors (1).

210100100121979 is an equidigital number, since it uses as much as digits as its factorization.

210100100121979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 210100100121979 in words is "two hundred ten trillion, one hundred billion, one hundred million, one hundred twenty-one thousand, nine hundred seventy-nine".