221201200210212 has 36 divisors (see below), whose sum is σ = 564277271698140. Its totient is φ = 73057277132352.

The previous prime is 221201200210163. The next prime is 221201200210219. The reversal of 221201200210212 is 212012002102122.

It is a happy number.

221201200210212 is a `hidden beast` number, since 2 + 2 + 120 + 120 + 0 + 210 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 74887839058176 + 146313361152036 = 8653776^2 + 12096006^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221201200210219) 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 11 ways as a sum of consecutive naturals, for example, 28185673983 + ... + 28185681830.

Almost surely, 2^{221201200210212} is an apocalyptic number.

It is an amenable number.

221201200210212 is an abundant number, since it is smaller than the sum of its proper divisors (343076071487928).

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

221201200210212 is a wasteful number, since it uses less digits than its factorization.

221201200210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56371355932 (or 56371355927 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221201200210212 its reverse (212012002102122), we get a palindrome (433213202312334).

It can be divided in two parts, 2 and 21201200210212, that multiplied together give a palindrome (42402400420424).

The spelling of 221201200210212 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred million, two hundred ten thousand, two hundred twelve".