221111220212000 has 48 divisors (see below), whose sum is σ = 543270268070712. Its totient is φ = 88444488083200.

The previous prime is 221111220211979. The next prime is 221111220212011. The reversal of 221111220212000 is 212022111122.

It can be written as a sum of positive squares in 4 ways, for example, as 101828038816144 + 119283181395856 = 10090988^2 + 10921684^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221111220212000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27638898527 + ... + 27638906526.

Almost surely, 2^{221111220212000} is an apocalyptic number.

221111220212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111220212000 is an abundant number, since it is smaller than the sum of its proper divisors (322159047858712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111220212000 is an equidigital number, since it uses as much as digits as its factorization.

221111220212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55277805078 (or 55277805060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221111220212000 its reverse (212022111122), we get a palindrome (221323242323122).

The spelling of 221111220212000 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred twenty million, two hundred twelve thousand".