111221201012 has 24 divisors (see below), whose sum is σ = 201362452200. Its totient is φ = 53689333376.

The previous prime is 111221201011. The next prime is 111221201017. The reversal of 111221201012 is 210102122111.

It can be written as a sum of positive squares in 4 ways, for example, as 2086114276 + 109135086736 = 45674^2 + 330356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221201011) 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 7 ways as a sum of consecutive naturals, for example, 2556998 + ... + 2600130.

It is an arithmetic number, because the mean of its divisors is an integer number (8390102175).

Almost surely, 2^111221201012 is an apocalyptic number.

It is an amenable number.

111221201012 is a deficient number, since it is larger than the sum of its proper divisors (90141251188).

111221201012 is a wasteful number, since it uses less digits than its factorization.

111221201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65395 (or 65393 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111221201012 its reverse (210102122111), we get a palindrome (321323323123).

The spelling of 111221201012 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred one thousand, twelve".