21000011101099 has 4 divisors (see below), whose sum is σ = 21724149414960. Its totient is φ = 20275872787240.

The previous prime is 21000011101051. The next prime is 21000011101129. The reversal of 21000011101099 is 99010111000012.

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

It is a cyclic number.

It is not a de Polignac number, because 21000011101099 - 2¹⁵ = 21000011068331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000011101499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362069156887 + ... + 362069156944.

It is an arithmetic number, because the mean of its divisors is an integer number (5431037353740).

Almost surely, 2^{21000011101099} is an apocalyptic number.

21000011101099 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21000011101099 is a deficient number, since it is larger than the sum of its proper divisors (724138313861).

21000011101099 is an equidigital number, since it uses as much as digits as its factorization.

21000011101099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724138313860.

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 21000011101099 in words is "twenty-one trillion, eleven million, one hundred one thousand, ninety-nine".