111221143421 has 8 divisors (see below), whose sum is σ = 111720039000. Its totient is φ = 110722363200.

The previous prime is 111221143403. The next prime is 111221143463. The reversal of 111221143421 is 124341122111.

It can be written as a sum of positive squares in 4 ways, for example, as 33093067225 + 78128076196 = 181915^2 + 279514^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111221143421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221143471) 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, 2335355 + ... + 2382503.

It is an arithmetic number, because the mean of its divisors is an integer number (13965004875).

Almost surely, 2^111221143421 is an apocalyptic number.

It is an amenable number.

111221143421 is a deficient number, since it is larger than the sum of its proper divisors (498895579).

111221143421 is a wasteful number, since it uses less digits than its factorization.

111221143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57679.

The product of its digits is 384, while the sum is 23.

Adding to 111221143421 its reverse (124341122111), we get a palindrome (235562265532).

The spelling of 111221143421 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred forty-three thousand, four hundred twenty-one".