1220000212221 has 16 divisors (see below), whose sum is σ = 1859497228800. Its totient is φ = 696974496048.

The previous prime is 1220000212213. The next prime is 1220000212283. The reversal of 1220000212221 is 1222120000221.

It is not a de Polignac number, because 1220000212221 - 2³ = 1220000212213 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220000212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000212721) 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 15 ways as a sum of consecutive naturals, for example, 6931111 + ... + 7104948.

It is an arithmetic number, because the mean of its divisors is an integer number (116218576800).

Almost surely, 2^{1220000212221} is an apocalyptic number.

It is an amenable number.

1220000212221 is a deficient number, since it is larger than the sum of its proper divisors (639497016579).

1220000212221 is a wasteful number, since it uses less digits than its factorization.

1220000212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14040208.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220000212221 its reverse (1222120000221), we get a palindrome (2442120212442).

The spelling of 1220000212221 in words is "one trillion, two hundred twenty billion, two hundred twelve thousand, two hundred twenty-one".