111421351 has 2 divisors, whose sum is σ = 111421352. Its totient is φ = 111421350.

The previous prime is 111421267. The next prime is 111421367. The reversal of 111421351 is 153124111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111421351 - 2²¹ = 109324199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111421381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55710675 + 55710676.

It is an arithmetic number, because the mean of its divisors is an integer number (55710676).

Almost surely, 2^111421351 is an apocalyptic number.

111421351 is a deficient number, since it is larger than the sum of its proper divisors (1).

111421351 is an equidigital number, since it uses as much as digits as its factorization.

111421351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 19.

The square root of 111421351 is about 10555.6312459275. The cubic root of 111421351 is about 481.1968843160.

Adding to 111421351 its reverse (153124111), we get a palindrome (264545462).

The spelling of 111421351 in words is "one hundred eleven million, four hundred twenty-one thousand, three hundred fifty-one".