221222201012 has 24 divisors (see below), whose sum is σ = 391671249480. Its totient is φ = 109317288960.

The previous prime is 221222200919. The next prime is 221222201017. The reversal of 221222201012 is 210102222122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68914650256 + 152307550756 = 262516^2 + 390266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222201017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625538 + ... + 913094.

It is an arithmetic number, because the mean of its divisors is an integer number (16319635395).

Almost surely, 2^221222201012 is an apocalyptic number.

It is an amenable number.

221222201012 is a deficient number, since it is larger than the sum of its proper divisors (170449048468).

221222201012 is a wasteful number, since it uses less digits than its factorization.

221222201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289811 (or 289809 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221222201012 its reverse (210102222122), we get a palindrome (431324423134).

The spelling of 221222201012 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred one thousand, twelve".