221012122200111 has 48 divisors (see below), whose sum is σ = 358191621610368. Its totient is φ = 130137951326400.

The previous prime is 221012122200109. The next prime is 221012122200173. The reversal of 221012122200111 is 111002221210122.

221012122200111 is a `hidden beast` number, since 2 + 210 + 121 + 2 + 220 + 0 + 111 = 666.

It is not a de Polignac number, because 221012122200111 - 2¹ = 221012122200109 is a prime.

It is a super-2 number, since 2×221012122200111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012122200811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41127601 + ... + 46189866.

It is an arithmetic number, because the mean of its divisors is an integer number (7462325450216).

Almost surely, 2^{221012122200111} is an apocalyptic number.

221012122200111 is a deficient number, since it is larger than the sum of its proper divisors (137179499410257).

221012122200111 is a wasteful number, since it uses less digits than its factorization.

221012122200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87318212 (or 87318209 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221012122200111 its reverse (111002221210122), we get a palindrome (332014343410233).

It can be divided in two parts, 22101 and 2122200111, that added together give a palindrome (2122222212).

The spelling of 221012122200111 in words is "two hundred twenty-one trillion, twelve billion, one hundred twenty-two million, two hundred thousand, one hundred eleven".