221212102202210 has 32 divisors (see below), whose sum is σ = 481833419253120. Its totient is φ = 71382728777472.

The previous prime is 221212102202191. The next prime is 221212102202213. The reversal of 221212102202210 is 12202201212122.

It is not an unprimeable number, because it can be changed into a prime (221212102202213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92946260240 + ... + 92946262619.

It is an arithmetic number, because the mean of its divisors is an integer number (15057294351660).

Almost surely, 2^{221212102202210} is an apocalyptic number.

221212102202210 is an abundant number, since it is smaller than the sum of its proper divisors (260621317050910).

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

221212102202210 is a wasteful number, since it uses less digits than its factorization.

221212102202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185892522890.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221212102202210 its reverse (12202201212122), we get a palindrome (233414303414332).

The spelling of 221212102202210 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred two million, two hundred two thousand, two hundred ten".