221211122010 has 32 divisors (see below), whose sum is σ = 553989594240. Its totient is φ = 56424865728.

The previous prime is 221211121969. The next prime is 221211122017. The reversal of 221211122010 is 10221112122.

221211122010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (221211122017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160297225 + ... + 160298604.

It is an arithmetic number, because the mean of its divisors is an integer number (17312174820).

Almost surely, 2^221211122010 is an apocalyptic number.

221211122010 is an abundant number, since it is smaller than the sum of its proper divisors (332778472230).

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

221211122010 is a wasteful number, since it uses less digits than its factorization.

221211122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320595862.

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

Adding to 221211122010 its reverse (10221112122), we get a palindrome (231432234132).

The spelling of 221211122010 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, ten".