21023110110 has 32 divisors (see below), whose sum is σ = 50468211072. Its totient is φ = 5604746400.

The previous prime is 21023110109. The next prime is 21023110111. The reversal of 21023110110 is 1101132012.

It is an interprime number because it is at equal distance from previous prime (21023110109) and next prime (21023110111).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023110111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35037 + ... + 208023.

It is an arithmetic number, because the mean of its divisors is an integer number (1577131596).

Almost surely, 2^21023110110 is an apocalyptic number.

21023110110 is an abundant number, since it is smaller than the sum of its proper divisors (29445100962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023110110 is a wasteful number, since it uses less digits than its factorization.

21023110110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177048.

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

Adding to 21023110110 its reverse (1101132012), we get a palindrome (22124242122).

The spelling of 21023110110 in words is "twenty-one billion, twenty-three million, one hundred ten thousand, one hundred ten".