101001210999991 has 2 divisors, whose sum is σ = 101001210999992. Its totient is φ = 101001210999990.

The previous prime is 101001210999947. The next prime is 101001211000009. The reversal of 101001210999991 is 199999012100101.

It is a strong prime.

It is an emirp because it is prime and its reverse (199999012100101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101001210999991 - 2¹³ = 101001210991799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101001210799991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50500605499995 + 50500605499996.

It is an arithmetic number, because the mean of its divisors is an integer number (50500605499996).

Almost surely, 2^{101001210999991} is an apocalyptic number.

101001210999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

101001210999991 is an equidigital number, since it uses as much as digits as its factorization.

101001210999991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 52.

The spelling of 101001210999991 in words is "one hundred one trillion, one billion, two hundred ten million, nine hundred ninety-nine thousand, nine hundred ninety-one".