221671200002011 has 32 divisors (see below), whose sum is σ = 232987107225600. Its totient is φ = 210899919114720.

The previous prime is 221671200002009. The next prime is 221671200002047. The reversal of 221671200002011 is 110200002176122.

It is not a de Polignac number, because 221671200002011 - 2¹ = 221671200002009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221671200002051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2872577950 + ... + 2872655116.

It is an arithmetic number, because the mean of its divisors is an integer number (7280847100800).

Almost surely, 2^{221671200002011} is an apocalyptic number.

221671200002011 is a deficient number, since it is larger than the sum of its proper divisors (11315907223589).

221671200002011 is an equidigital number, since it uses as much as digits as its factorization.

221671200002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78496 (or 78450 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 221671200002011 its reverse (110200002176122), we get a palindrome (331871202178133).

The spelling of 221671200002011 in words is "two hundred twenty-one trillion, six hundred seventy-one billion, two hundred million, two thousand, eleven".