101210000209991 has 2 divisors, whose sum is σ = 101210000209992. Its totient is φ = 101210000209990.

The previous prime is 101210000209987. The next prime is 101210000210113. The reversal of 101210000209991 is 199902000012101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101210000209991 - 2² = 101210000209987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101210000209291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605000104995 + 50605000104996.

It is an arithmetic number, because the mean of its divisors is an integer number (50605000104996).

Almost surely, 2^{101210000209991} is an apocalyptic number.

101210000209991 is a deficient number, since it is larger than the sum of its proper divisors (1).

101210000209991 is an equidigital number, since it uses as much as digits as its factorization.

101210000209991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 101210000209991 in words is "one hundred one trillion, two hundred ten billion, two hundred nine thousand, nine hundred ninety-one".