221000111212011 has 32 divisors (see below), whose sum is σ = 320512652748288. Its totient is φ = 134885277734400.

The previous prime is 221000111212009. The next prime is 221000111212043. The reversal of 221000111212011 is 110212111000122.

It is a happy number.

It is not a de Polignac number, because 221000111212011 - 2¹ = 221000111212009 is a prime.

It is a super-2 number, since 2×221000111212011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221000111212051) 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, 7075015 + ... + 22182336.

It is an arithmetic number, because the mean of its divisors is an integer number (10016020398384).

Almost surely, 2^{221000111212011} is an apocalyptic number.

221000111212011 is a deficient number, since it is larger than the sum of its proper divisors (99512541536277).

221000111212011 is a wasteful number, since it uses less digits than its factorization.

221000111212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29261411.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221000111212011 its reverse (110212111000122), we get a palindrome (331212222212133).

It can be divided in two parts, 221000111 and 212011, that added together give a palindrome (221212122).

The spelling of 221000111212011 in words is "two hundred twenty-one trillion, one hundred eleven million, two hundred twelve thousand, eleven".