221001020111212 has 24 divisors (see below), whose sum is σ = 421921392161472. Its totient is φ = 100452543958800.

The previous prime is 221001020111161. The next prime is 221001020111317. The reversal of 221001020111212 is 212111020100122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59815614 + ... + 63402757.

It is an arithmetic number, because the mean of its divisors is an integer number (17580058006728).

Almost surely, 2^{221001020111212} is an apocalyptic number.

221001020111212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221001020111212 is a deficient number, since it is larger than the sum of its proper divisors (200920372050260).

221001020111212 is a wasteful number, since it uses less digits than its factorization.

221001020111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123259149 (or 123259147 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221001020111212 its reverse (212111020100122), we get a palindrome (433112040211334).

The spelling of 221001020111212 in words is "two hundred twenty-one trillion, one billion, twenty million, one hundred eleven thousand, two hundred twelve".