221120000211812 has 12 divisors (see below), whose sum is σ = 416726154245436. Its totient is φ = 102055384713120.

The previous prime is 221120000211811. The next prime is 221120000211853. The reversal of 221120000211812 is 218112000021122.

It can be written as a sum of positive squares in 2 ways, for example, as 133288502764096 + 87831497447716 = 11545064^2 + 9371846^2 .

It is not an unprimeable number, because it can be changed into a prime (221120000211811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2126153848139 + ... + 2126153848242.

It is an arithmetic number, because the mean of its divisors is an integer number (34727179520453).

Almost surely, 2^{221120000211812} is an apocalyptic number.

It is an amenable number.

221120000211812 is a deficient number, since it is larger than the sum of its proper divisors (195606154033624).

221120000211812 is a wasteful number, since it uses less digits than its factorization.

221120000211812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252307696398 (or 4252307696396 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

Adding to 221120000211812 its reverse (218112000021122), we get a palindrome (439232000232934).

The spelling of 221120000211812 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred eleven thousand, eight hundred twelve".