2212112201221 has 24 divisors (see below), whose sum is σ = 2521824180000. Its totient is φ = 1934180793792.

The previous prime is 2212112201219. The next prime is 2212112201237. The reversal of 2212112201221 is 1221022112122.

It is not a de Polignac number, because 2212112201221 - 2¹ = 2212112201219 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 (2212112201521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22263670 + ... + 22362808.

It is an arithmetic number, because the mean of its divisors is an integer number (105076007500).

Almost surely, 2^{2212112201221} is an apocalyptic number.

It is an amenable number.

2212112201221 is a deficient number, since it is larger than the sum of its proper divisors (309711978779).

2212112201221 is a wasteful number, since it uses less digits than its factorization.

2212112201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106133 (or 106120 counting only the distinct ones).

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

Adding to 2212112201221 its reverse (1221022112122), we get a palindrome (3433134313343).

The spelling of 2212112201221 in words is "two trillion, two hundred twelve billion, one hundred twelve million, two hundred one thousand, two hundred twenty-one".