111121012127 has 2 divisors, whose sum is σ = 111121012128. Its totient is φ = 111121012126.

The previous prime is 111121012063. The next prime is 111121012139. The reversal of 111121012127 is 721210121111.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (721210121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111121012127 - 2⁶ = 111121012063 is a prime.

It is a super-2 number, since 2×111121012127² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111121012099 and 111121012108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111121014127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560506063 + 55560506064.

It is an arithmetic number, because the mean of its divisors is an integer number (55560506064).

Almost surely, 2^111121012127 is an apocalyptic number.

111121012127 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121012127 is an equidigital number, since it uses as much as digits as its factorization.

111121012127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 111121012127 its reverse (721210121111), we get a palindrome (832331133238).

The spelling of 111121012127 in words is "one hundred eleven billion, one hundred twenty-one million, twelve thousand, one hundred twenty-seven".