221222012122 has 8 divisors (see below), whose sum is σ = 331835013972. Its totient is φ = 110610340800.

The previous prime is 221222012117. The next prime is 221222012147. The reversal of 221222012122 is 221210222122.

It can be written as a sum of positive squares in 2 ways, for example, as 221201843041 + 20169081 = 470321^2 + 4491^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 221222012122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484722 + ... + 823042.

Almost surely, 2^221222012122 is an apocalyptic number.

221222012122 is a deficient number, since it is larger than the sum of its proper divisors (110613001850).

221222012122 is a wasteful number, since it uses less digits than its factorization.

221222012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665264.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221222012122 its reverse (221210222122), we get a palindrome (442432234244).

The spelling of 221222012122 in words is "two hundred twenty-one billion, two hundred twenty-two million, twelve thousand, one hundred twenty-two".