111231120151 has 2 divisors, whose sum is σ = 111231120152. Its totient is φ = 111231120150.

The previous prime is 111231120149. The next prime is 111231120223. The reversal of 111231120151 is 151021132111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111231120151 - 2¹ = 111231120149 is a prime.

Together with 111231120149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111231120131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615560075 + 55615560076.

It is an arithmetic number, because the mean of its divisors is an integer number (55615560076).

Almost surely, 2^111231120151 is an apocalyptic number.

111231120151 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231120151 is an equidigital number, since it uses as much as digits as its factorization.

111231120151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 111231120151 its reverse (151021132111), we get a palindrome (262252252262).

The spelling of 111231120151 in words is "one hundred eleven billion, two hundred thirty-one million, one hundred twenty thousand, one hundred fifty-one".