111420151 has 4 divisors (see below), whose sum is σ = 113522472. Its totient is φ = 109317832.

The previous prime is 111420149. The next prime is 111420157. The reversal of 111420151 is 151024111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151024111 = 7 ⋅21574873.

It is a cyclic number.

It is not a de Polignac number, because 111420151 - 2¹ = 111420149 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 (111420157) 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, 1051081 + ... + 1051186.

It is an arithmetic number, because the mean of its divisors is an integer number (28380618).

Almost surely, 2^111420151 is an apocalyptic number.

111420151 is a deficient number, since it is larger than the sum of its proper divisors (2102321).

111420151 is an equidigital number, since it uses as much as digits as its factorization.

111420151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102320.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 111420151 is about 10555.5744040767. The cubic root of 111420151 is about 481.1951568245.

Adding to 111420151 its reverse (151024111), we get a palindrome (262444262).

The spelling of 111420151 in words is "one hundred eleven million, four hundred twenty thousand, one hundred fifty-one".