221200121211112 has 32 divisors (see below), whose sum is σ = 415739955041280. Its totient is φ = 110336138982720.

The previous prime is 221200121211073. The next prime is 221200121211119. The reversal of 221200121211112 is 211112121002122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221200121211112.

It is not an unprimeable number, because it can be changed into a prime (221200121211119) 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, 358933113 + ... + 359548855.

It is an arithmetic number, because the mean of its divisors is an integer number (12991873595040).

Almost surely, 2^{221200121211112} is an apocalyptic number.

It is an amenable number.

221200121211112 is a deficient number, since it is larger than the sum of its proper divisors (194539833830168).

221200121211112 is a wasteful number, since it uses less digits than its factorization.

221200121211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722833 (or 722829 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221200121211112 its reverse (211112121002122), we get a palindrome (432312242213234).

The spelling of 221200121211112 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twelve".