21213301231110 has 128 divisors (see below), whose sum is σ = 52237307460096. Its totient is φ = 5510338606080.

The previous prime is 21213301231091. The next prime is 21213301231141. The reversal of 21213301231110 is 1113210331212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2434668114 + ... + 2434676826.

It is an arithmetic number, because the mean of its divisors is an integer number (408103964532).

Almost surely, 2^{21213301231110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21213301231110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26118653730048).

21213301231110 is an abundant number, since it is smaller than the sum of its proper divisors (31024006228986).

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

21213301231110 is a wasteful number, since it uses less digits than its factorization.

21213301231110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13670.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21213301231110 its reverse (1113210331212), we get a palindrome (22326511562322).

The spelling of 21213301231110 in words is "twenty-one trillion, two hundred thirteen billion, three hundred one million, two hundred thirty-one thousand, one hundred ten".