221012221112210 has 128 divisors (see below), whose sum is σ = 444131807616000. Its totient is φ = 78513127096320.

The previous prime is 221012221112183. The next prime is 221012221112213. The reversal of 221012221112210 is 12211122210122.

It is a super-2 number, since 2×221012221112210² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221012221112213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 493725671 + ... + 494173109.

It is an arithmetic number, because the mean of its divisors is an integer number (3469779747000).

Almost surely, 2^{221012221112210} is an apocalyptic number.

221012221112210 is an abundant number, since it is smaller than the sum of its proper divisors (223119586503790).

221012221112210 is a wasteful number, since it uses less digits than its factorization.

221012221112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448116.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221012221112210 its reverse (12211122210122), we get a palindrome (233223343322332).

It can be divided in two parts, 2210122 and 21112210, that added together give a palindrome (23322332).

The spelling of 221012221112210 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, one hundred twelve thousand, two hundred ten".