111221440421 has 8 divisors (see below), whose sum is σ = 136887926784. Its totient is φ = 87999381360.

The previous prime is 111221440409. The next prime is 111221440453. The reversal of 111221440421 is 124044122111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111221440421 - 2⁶ = 111221440357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221440471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611106725 + ... + 611106906.

It is an arithmetic number, because the mean of its divisors is an integer number (17110990848).

Almost surely, 2^111221440421 is an apocalyptic number.

It is an amenable number.

111221440421 is a deficient number, since it is larger than the sum of its proper divisors (25666486363).

111221440421 is a wasteful number, since it uses less digits than its factorization.

111221440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222213651.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 111221440421 its reverse (124044122111), we get a palindrome (235265562532).

The spelling of 111221440421 in words is "one hundred eleven billion, two hundred twenty-one million, four hundred forty thousand, four hundred twenty-one".