221211212200210 has 16 divisors (see below), whose sum is σ = 411910533063000. Its totient is φ = 85433295746176.

The previous prime is 221211212200129. The next prime is 221211212200217. The reversal of 221211212200210 is 12002212112122.

221211212200210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 155420279432289 + 65790932767921 = 12466767^2 + 8111161^2 .

It is not an unprimeable number, because it can be changed into a prime (221211212200217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381398641435 + ... + 381398642014.

Almost surely, 2^{221211212200210} is an apocalyptic number.

221211212200210 is a deficient number, since it is larger than the sum of its proper divisors (190699320862790).

221211212200210 is a wasteful number, since it uses less digits than its factorization.

221211212200210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762797283485.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221211212200210 its reverse (12002212112122), we get a palindrome (233213424312332).

The spelling of 221211212200210 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred twelve million, two hundred thousand, two hundred ten".