221222011412 has 12 divisors (see below), whose sum is σ = 387500677620. Its totient is φ = 110507532096.

The previous prime is 221222011391. The next prime is 221222011433. The reversal of 221222011412 is 214110222122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221222011391) and next prime (221222011433).

It can be written as a sum of positive squares in 2 ways, for example, as 88468174096 + 132753837316 = 297436^2 + 364354^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25863593 + ... + 25872144.

It is an arithmetic number, because the mean of its divisors is an integer number (32291723135).

Almost surely, 2^221222011412 is an apocalyptic number.

It is an amenable number.

221222011412 is a deficient number, since it is larger than the sum of its proper divisors (166278666208).

221222011412 is a wasteful number, since it uses less digits than its factorization.

221222011412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51736810 (or 51736808 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221222011412 its reverse (214110222122), we get a palindrome (435332233534).

The spelling of 221222011412 in words is "two hundred twenty-one billion, two hundred twenty-two million, eleven thousand, four hundred twelve".