111213404201 has 16 divisors (see below), whose sum is σ = 120853048464. Its totient is φ = 101946783744.

The previous prime is 111213404171. The next prime is 111213404209. The reversal of 111213404201 is 102404312111.

It can be written as a sum of positive squares in 8 ways, for example, as 27836176 + 111185568025 = 5276^2 + 333445^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111213404201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111213404209) 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, 327050 + ... + 573923.

It is an arithmetic number, because the mean of its divisors is an integer number (7553315529).

Almost surely, 2^111213404201 is an apocalyptic number.

It is an amenable number.

111213404201 is a deficient number, since it is larger than the sum of its proper divisors (9639644263).

111213404201 is a wasteful number, since it uses less digits than its factorization.

111213404201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901180.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 111213404201 its reverse (102404312111), we get a palindrome (213617716312).

It can be divided in two parts, 111 and 213404201, that added together give a palindrome (213404312).

The spelling of 111213404201 in words is "one hundred eleven billion, two hundred thirteen million, four hundred four thousand, two hundred one".