1222012112221 has 8 divisors (see below), whose sum is σ = 1290972330080. Its totient is φ = 1153516273488.

The previous prime is 1222012112179. The next prime is 1222012112239. The reversal of 1222012112221 is 1222112102221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222012112221 - 2²¹ = 1222010015069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222012112521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116089371 + ... + 116099896.

It is an arithmetic number, because the mean of its divisors is an integer number (161371541260).

Almost surely, 2^{1222012112221} is an apocalyptic number.

It is an amenable number.

1222012112221 is a deficient number, since it is larger than the sum of its proper divisors (68960217859).

1222012112221 is a wasteful number, since it uses less digits than its factorization.

1222012112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232189563.

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

Adding to 1222012112221 its reverse (1222112102221), we get a palindrome (2444124214442).

The spelling of 1222012112221 in words is "one trillion, two hundred twenty-two billion, twelve million, one hundred twelve thousand, two hundred twenty-one".