221211112210 has 192 divisors, whose sum is σ = 461558756736. Its totient is φ = 76200284160.

The previous prime is 221211112201. The next prime is 221211112217. The reversal of 221211112210 is 12211112122.

It is a super-2 number, since 2×221211112210² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221211112217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 267485817 + ... + 267486643.

It is an arithmetic number, because the mean of its divisors is an integer number (2403951858).

Almost surely, 2^221211112210 is an apocalyptic number.

221211112210 is an abundant number, since it is smaller than the sum of its proper divisors (240347644526).

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

221211112210 is a wasteful number, since it uses less digits than its factorization.

221211112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221211112210 its reverse (12211112122), we get a palindrome (233422224332).

The spelling of 221211112210 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, two hundred ten".