111221001238 has 32 divisors (see below), whose sum is σ = 175855680000. Its totient is φ = 52652102976.

The previous prime is 111221001211. The next prime is 111221001239. The reversal of 111221001238 is 832100122111.

It is a super-2 number, since 2×111221001238² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221001239) 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, 14442313 + ... + 14450011.

It is an arithmetic number, because the mean of its divisors is an integer number (5495490000).

Almost surely, 2^111221001238 is an apocalyptic number.

111221001238 is a deficient number, since it is larger than the sum of its proper divisors (64634678762).

111221001238 is a wasteful number, since it uses less digits than its factorization.

111221001238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10876.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 111221001238 its reverse (832100122111), we get a palindrome (943321123349).

The spelling of 111221001238 in words is "one hundred eleven billion, two hundred twenty-one million, one thousand, two hundred thirty-eight".