101021201999 has 16 divisors (see below), whose sum is σ = 107509677408. Its totient is φ = 94594301952.

The previous prime is 101021201989. The next prime is 101021202013. The reversal of 101021201999 is 999102120101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101021201999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101021201989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3713204 + ... + 3740310.

It is an arithmetic number, because the mean of its divisors is an integer number (6719354838).

Almost surely, 2^101021201999 is an apocalyptic number.

101021201999 is a deficient number, since it is larger than the sum of its proper divisors (6488475409).

101021201999 is a wasteful number, since it uses less digits than its factorization.

101021201999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28234.

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

The spelling of 101021201999 in words is "one hundred one billion, twenty-one million, two hundred one thousand, nine hundred ninety-nine".