1012231111 has 2 divisors, whose sum is σ = 1012231112. Its totient is φ = 1012231110.

The previous prime is 1012231093. The next prime is 1012231123. The reversal of 1012231111 is 1111322101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1012231111 - 2¹⁷ = 1012100039 is a prime.

It is a super-2 number, since 2×1012231111² = 2049223644152588642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1012231091 and 1012231100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012231811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506115555 + 506115556.

It is an arithmetic number, because the mean of its divisors is an integer number (506115556).

Almost surely, 2^1012231111 is an apocalyptic number.

1012231111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012231111 is an equidigital number, since it uses as much as digits as its factorization.

1012231111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1012231111 is about 31815.5796898312. The cubic root of 1012231111 is about 1004.0605268056.

Adding to 1012231111 its reverse (1111322101), we get a palindrome (2123553212).

The spelling of 1012231111 in words is "one billion, twelve million, two hundred thirty-one thousand, one hundred eleven".