21100102231109 has 4 divisors (see below), whose sum is σ = 23018293343040. Its totient is φ = 19181911119180.

The previous prime is 21100102231099. The next prime is 21100102231123. The reversal of 21100102231109 is 90113220100112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21100102231109 - 2⁸ = 21100102230853 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 (21100102231129) 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, 959095555949 + ... + 959095555970.

It is an arithmetic number, because the mean of its divisors is an integer number (5754573335760).

Almost surely, 2^{21100102231109} is an apocalyptic number.

It is an amenable number.

21100102231109 is a deficient number, since it is larger than the sum of its proper divisors (1918191111931).

21100102231109 is a wasteful number, since it uses less digits than its factorization.

21100102231109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918191111930.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21100102231109 in words is "twenty-one trillion, one hundred billion, one hundred two million, two hundred thirty-one thousand, one hundred nine".