221012101312 has 14 divisors (see below), whose sum is σ = 438570888668. Its totient is φ = 110506050624.

The previous prime is 221012101243. The next prime is 221012101319. The reversal of 221012101312 is 213101210122.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (221012101319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1726656978 + ... + 1726657105.

Almost surely, 2^221012101312 is an apocalyptic number.

It is an amenable number.

221012101312 is a deficient number, since it is larger than the sum of its proper divisors (217558787356).

221012101312 is an equidigital number, since it uses as much as digits as its factorization.

221012101312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453314095 (or 3453314085 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221012101312 its reverse (213101210122), we get a palindrome (434113311434).

The spelling of 221012101312 in words is "two hundred twenty-one billion, twelve million, one hundred one thousand, three hundred twelve".