221112131012 has 6 divisors (see below), whose sum is σ = 386946229278. Its totient is φ = 110556065504.

The previous prime is 221112130951. The next prime is 221112131089. The reversal of 221112131012 is 210131211122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 210833415556 + 10278715456 = 459166^2 + 101384^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27639016373 + ... + 27639016380.

It is an arithmetic number, because the mean of its divisors is an integer number (64491038213).

Almost surely, 2^221112131012 is an apocalyptic number.

It is an amenable number.

221112131012 is a deficient number, since it is larger than the sum of its proper divisors (165834098266).

221112131012 is a wasteful number, since it uses less digits than its factorization.

221112131012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55278032757 (or 55278032755 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 221112131012 its reverse (210131211122), we get a palindrome (431243342134).

The spelling of 221112131012 in words is "two hundred twenty-one billion, one hundred twelve million, one hundred thirty-one thousand, twelve".