111311021051 has 2 divisors, whose sum is σ = 111311021052. Its totient is φ = 111311021050.

The previous prime is 111311021021. The next prime is 111311021113. The reversal of 111311021051 is 150120113111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111311021051 - 2¹⁰ = 111311020027 is a prime.

It is not a weakly prime, because it can be changed into another prime (111311021021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55655510525 + 55655510526.

It is an arithmetic number, because the mean of its divisors is an integer number (55655510526).

Almost surely, 2^111311021051 is an apocalyptic number.

111311021051 is a deficient number, since it is larger than the sum of its proper divisors (1).

111311021051 is an equidigital number, since it uses as much as digits as its factorization.

111311021051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 17.

Adding to 111311021051 its reverse (150120113111), we get a palindrome (261431134162).

The spelling of 111311021051 in words is "one hundred eleven billion, three hundred eleven million, twenty-one thousand, fifty-one".