21111023110 has 32 divisors (see below), whose sum is σ = 39675018240. Its totient is φ = 8072574048.

The previous prime is 21111023051. The next prime is 21111023117. The reversal of 21111023110 is 1132011112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111023117) 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, 384351 + ... + 435829.

It is an arithmetic number, because the mean of its divisors is an integer number (1239844320).

Almost surely, 2^21111023110 is an apocalyptic number.

21111023110 is a deficient number, since it is larger than the sum of its proper divisors (18563995130).

21111023110 is a wasteful number, since it uses less digits than its factorization.

21111023110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53292.

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

Adding to 21111023110 its reverse (1132011112), we get a palindrome (22243034222).

The spelling of 21111023110 in words is "twenty-one billion, one hundred eleven million, twenty-three thousand, one hundred ten".