221111201212011 has 32 divisors (see below), whose sum is σ = 361874872243200. Its totient is φ = 132310500135840.

The previous prime is 221111201212007. The next prime is 221111201212087. The reversal of 221111201212011 is 110212102111122.

It is a happy number.

221111201212011 is a `hidden beast` number, since 221 + 1 + 1 + 120 + 121 + 201 + 1 = 666.

It is not a de Polignac number, because 221111201212011 - 2² = 221111201212007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221111201212711) 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, 4711888936 + ... + 4711935861.

It is an arithmetic number, because the mean of its divisors is an integer number (11308589757600).

Almost surely, 2^{221111201212011} is an apocalyptic number.

221111201212011 is a deficient number, since it is larger than the sum of its proper divisors (140763671031189).

221111201212011 is a wasteful number, since it uses less digits than its factorization.

221111201212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423824896 (or 9423824890 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221111201212011 its reverse (110212102111122), we get a palindrome (331323303323133).

The spelling of 221111201212011 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred one million, two hundred twelve thousand, eleven".