221111022011201 has 16 divisors (see below), whose sum is σ = 255657613209600. Its totient is φ = 187316484923088.

The previous prime is 221111022011183. The next prime is 221111022011203. The reversal of 221111022011201 is 102110220111122.

It is a cyclic number.

It is not a de Polignac number, because 221111022011201 - 2⁶ = 221111022011137 is a prime.

It is a super-2 number, since 2×221111022011201² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221111022011201.

It is not an unprimeable number, because it can be changed into a prime (221111022011203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509304731 + ... + 509738688.

It is an arithmetic number, because the mean of its divisors is an integer number (15978600825600).

Almost surely, 2^{221111022011201} is an apocalyptic number.

It is an amenable number.

221111022011201 is a deficient number, since it is larger than the sum of its proper divisors (34546591198399).

221111022011201 is a wasteful number, since it uses less digits than its factorization.

221111022011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019043788.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221111022011201 its reverse (102110220111122), we get a palindrome (323221242122323).

The spelling of 221111022011201 in words is "two hundred twenty-one trillion, one hundred eleven billion, twenty-two million, eleven thousand, two hundred one".