21100223102 has 24 divisors (see below), whose sum is σ = 38755515240. Its totient is φ = 8567007120.

The previous prime is 21100223093. The next prime is 21100223107. The reversal of 21100223102 is 20132200112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100223107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5664149 + ... + 5667872.

It is an arithmetic number, because the mean of its divisors is an integer number (1614813135).

Almost surely, 2^21100223102 is an apocalyptic number.

21100223102 is a deficient number, since it is larger than the sum of its proper divisors (17655292138).

21100223102 is a wasteful number, since it uses less digits than its factorization.

21100223102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11332056 (or 11332049 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21100223102 its reverse (20132200112), we get a palindrome (41232423214).

The spelling of 21100223102 in words is "twenty-one billion, one hundred million, two hundred twenty-three thousand, one hundred two".