21201101110 has 32 divisors (see below), whose sum is σ = 43717349952. Its totient is φ = 7251672960.

The previous prime is 21201101101. The next prime is 21201101111. The reversal of 21201101110 is 1110110212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201101111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330237 + ... + 389176.

It is an arithmetic number, because the mean of its divisors is an integer number (1366167186).

Almost surely, 2^21201101110 is an apocalyptic number.

21201101110 is an abundant number, since it is smaller than the sum of its proper divisors (22516248842).

21201101110 is a wasteful number, since it uses less digits than its factorization.

21201101110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719848.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21201101110 its reverse (1110110212), we get a palindrome (22311211322).

The spelling of 21201101110 in words is "twenty-one billion, two hundred one million, one hundred one thousand, one hundred ten".