21211013110 has 32 divisors (see below), whose sum is σ = 44124367680. Its totient is φ = 7190633472.

The previous prime is 21211013093. The next prime is 21211013111. The reversal of 21211013110 is 1131011212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211013111) 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, 1696099 + ... + 1708558.

It is an arithmetic number, because the mean of its divisors is an integer number (1378886490).

Almost surely, 2^21211013110 is an apocalyptic number.

21211013110 is an abundant number, since it is smaller than the sum of its proper divisors (22913354570).

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

21211013110 is a wasteful number, since it uses less digits than its factorization.

21211013110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404760.

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

Adding to 21211013110 its reverse (1131011212), we get a palindrome (22342024322).

The spelling of 21211013110 in words is "twenty-one billion, two hundred eleven million, thirteen thousand, one hundred ten".