111421050551 has 2 divisors, whose sum is σ = 111421050552. Its totient is φ = 111421050550.

The previous prime is 111421050529. The next prime is 111421050571. The reversal of 111421050551 is 155050124111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111421050551 - 2⁶ = 111421050487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111421050551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111421050571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55710525275 + 55710525276.

It is an arithmetic number, because the mean of its divisors is an integer number (55710525276).

Almost surely, 2^111421050551 is an apocalyptic number.

111421050551 is a deficient number, since it is larger than the sum of its proper divisors (1).

111421050551 is an equidigital number, since it uses as much as digits as its factorization.

111421050551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 111421050551 its reverse (155050124111), we get a palindrome (266471174662).

The spelling of 111421050551 in words is "one hundred eleven billion, four hundred twenty-one million, fifty thousand, five hundred fifty-one".