21101123110 has 8 divisors (see below), whose sum is σ = 37982021616. Its totient is φ = 8440449240.

The previous prime is 21101123089. The next prime is 21101123123. The reversal of 21101123110 is 1132110112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055056146 + ... + 1055056165.

It is an arithmetic number, because the mean of its divisors is an integer number (4747752702).

Almost surely, 2^21101123110 is an apocalyptic number.

21101123110 is a deficient number, since it is larger than the sum of its proper divisors (16880898506).

21101123110 is a wasteful number, since it uses less digits than its factorization.

21101123110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110112318.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21101123110 its reverse (1132110112), we get a palindrome (22233233222).

The spelling of 21101123110 in words is "twenty-one billion, one hundred one million, one hundred twenty-three thousand, one hundred ten".