221212212110202 has 128 divisors (see below), whose sum is σ = 478856287710720. Its totient is φ = 67866942341120.

The previous prime is 221212212110077. The next prime is 221212212110213. The reversal of 221212212110202 is 202011212212122.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4038681688 + ... + 4038736460.

It is an arithmetic number, because the mean of its divisors is an integer number (3741064747740).

Almost surely, 2^{221212212110202} is an apocalyptic number.

221212212110202 is an abundant number, since it is smaller than the sum of its proper divisors (257644075600518).

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

221212212110202 is a wasteful number, since it uses less digits than its factorization.

221212212110202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57288.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221212212110202 its reverse (202011212212122), we get a palindrome (423223424322324).

The spelling of 221212212110202 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twelve million, one hundred ten thousand, two hundred two".