111211144421431 has 4 divisors (see below), whose sum is σ = 111216360970000. Its totient is φ = 111205927872864.

The previous prime is 111211144421407. The next prime is 111211144421501. The reversal of 111211144421431 is 134124441112111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111211144421431 - 2²⁷ = 111211010203703 is a prime.

It is a super-2 number, since 2×111211144421431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211144421393 and 111211144421402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211144481431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2608242306 + ... + 2608284943.

It is an arithmetic number, because the mean of its divisors is an integer number (27804090242500).

Almost surely, 2^{111211144421431} is an apocalyptic number.

111211144421431 is a deficient number, since it is larger than the sum of its proper divisors (5216548569).

111211144421431 is an equidigital number, since it uses as much as digits as its factorization.

111211144421431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216548568.

The product of its digits is 3072, while the sum is 31.

Adding to 111211144421431 its reverse (134124441112111), we get a palindrome (245335585533542).

The spelling of 111211144421431 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred forty-four million, four hundred twenty-one thousand, four hundred thirty-one".