210020102121979 has 2 divisors, whose sum is σ = 210020102121980. Its totient is φ = 210020102121978.

The previous prime is 210020102121941. The next prime is 210020102122021. The reversal of 210020102121979 is 979121201020012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210020102121979 - 2²³ = 210020093733371 is a prime.

It is not a weakly prime, because it can be changed into another prime (210020102121919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010051060989 + 105010051060990.

It is an arithmetic number, because the mean of its divisors is an integer number (105010051060990).

Almost surely, 2^{210020102121979} is an apocalyptic number.

210020102121979 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020102121979 is an equidigital number, since it uses as much as digits as its factorization.

210020102121979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 210020102121979 in words is "two hundred ten trillion, twenty billion, one hundred two million, one hundred twenty-one thousand, nine hundred seventy-nine".