111423421 has 2 divisors, whose sum is σ = 111423422. Its totient is φ = 111423420.

The previous prime is 111423409. The next prime is 111423463. The reversal of 111423421 is 124324111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90820900 + 20602521 = 9530^2 + 4539^2 .

It is a cyclic number.

It is not a de Polignac number, because 111423421 - 2¹⁹ = 110899133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111423401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55711710 + 55711711.

It is an arithmetic number, because the mean of its divisors is an integer number (55711711).

Almost surely, 2^111423421 is an apocalyptic number.

It is an amenable number.

111423421 is a deficient number, since it is larger than the sum of its proper divisors (1).

111423421 is an equidigital number, since it uses as much as digits as its factorization.

111423421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 111423421 is about 10555.7292974005. The cubic root of 111423421 is about 481.1998642099.

Adding to 111423421 its reverse (124324111), we get a palindrome (235747532).

The spelling of 111423421 in words is "one hundred eleven million, four hundred twenty-three thousand, four hundred twenty-one".