221000211222012 has 72 divisors (see below), whose sum is σ = 573998227975536. Its totient is φ = 71643207711744.

The previous prime is 221000211221989. The next prime is 221000211222019. The reversal of 221000211222012 is 210222112000122.

It is a happy number.

221000211222012 is a `hidden beast` number, since 221 + 0 + 0 + 0 + 211 + 2 + 220 + 12 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000211222019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34722453 + ... + 40591244.

Almost surely, 2^{221000211222012} is an apocalyptic number.

It is an amenable number.

221000211222012 is an abundant number, since it is smaller than the sum of its proper divisors (352998016753524).

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

221000211222012 is a wasteful number, since it uses less digits than its factorization.

221000211222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75315947 (or 75315942 counting only the distinct ones).

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

Adding to 221000211222012 its reverse (210222112000122), we get a palindrome (431222323222134).

The spelling of 221000211222012 in words is "two hundred twenty-one trillion, two hundred eleven million, two hundred twenty-two thousand, twelve".