2101011221999 has 4 divisors (see below), whose sum is σ = 2149871948136. Its totient is φ = 2052150495864.

The previous prime is 2101011221989. The next prime is 2101011222049. The reversal of 2101011221999 is 9991221101012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101011221999 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 (2101011221929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24430363004 + ... + 24430363089.

It is an arithmetic number, because the mean of its divisors is an integer number (537467987034).

Almost surely, 2^{2101011221999} is an apocalyptic number.

2101011221999 is a deficient number, since it is larger than the sum of its proper divisors (48860726137).

2101011221999 is an equidigital number, since it uses as much as digits as its factorization.

2101011221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48860726136.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 2101011221999 in words is "two trillion, one hundred one billion, eleven million, two hundred twenty-one thousand, nine hundred ninety-nine".