21202210110 has 32 divisors (see below), whose sum is σ = 53878558752. Its totient is φ = 5321338880.

The previous prime is 21202210069. The next prime is 21202210111. The reversal of 21202210110 is 1101220212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202210111) 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, 20785971 + ... + 20786990.

It is an arithmetic number, because the mean of its divisors is an integer number (1683704961).

Almost surely, 2^21202210110 is an apocalyptic number.

21202210110 is an abundant number, since it is smaller than the sum of its proper divisors (32676348642).

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

21202210110 is a wasteful number, since it uses less digits than its factorization.

21202210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41572988.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21202210110 its reverse (1101220212), we get a palindrome (22303430322).

The spelling of 21202210110 in words is "twenty-one billion, two hundred two million, two hundred ten thousand, one hundred ten".