2221221322110 has 192 divisors, whose sum is σ = 6347058600960. Its totient is φ = 495820442880.

The previous prime is 2221221322091. The next prime is 2221221322123. The reversal of 2221221322110 is 112231221222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31815621 + ... + 31885359.

It is an arithmetic number, because the mean of its divisors is an integer number (33057596880).

Almost surely, 2^{2221221322110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221221322110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3173529300480).

2221221322110 is an abundant number, since it is smaller than the sum of its proper divisors (4125837278850).

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

2221221322110 is a wasteful number, since it uses less digits than its factorization.

2221221322110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70271 (or 70264 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2221221322110 its reverse (112231221222), we get a palindrome (2333452543332).

The spelling of 2221221322110 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, three hundred twenty-two thousand, one hundred ten".