212221112010 has 256 divisors, whose sum is σ = 557461094400. Its totient is φ = 51559732224.

The previous prime is 212221111997. The next prime is 212221112017. The reversal of 212221112010 is 10211122212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212221112017) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 280344552 + ... + 280345308.

It is an arithmetic number, because the mean of its divisors is an integer number (2177582400).

Almost surely, 2^212221112010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212221112010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278730547200).

212221112010 is an abundant number, since it is smaller than the sum of its proper divisors (345239982390).

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

212221112010 is a wasteful number, since it uses less digits than its factorization.

212221112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212221112010 its reverse (10211122212), we get a palindrome (222432234222).

The spelling of 212221112010 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred twelve thousand, ten".