1001111212103 has 2 divisors, whose sum is σ = 1001111212104. Its totient is φ = 1001111212102.

The previous prime is 1001111212081. The next prime is 1001111212109. The reversal of 1001111212103 is 3012121111001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001111212103 - 2⁸ = 1001111211847 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001111212109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500555606051 + 500555606052.

It is an arithmetic number, because the mean of its divisors is an integer number (500555606052).

Almost surely, 2^{1001111212103} is an apocalyptic number.

1001111212103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001111212103 is an equidigital number, since it uses as much as digits as its factorization.

1001111212103 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 14.

Adding to 1001111212103 its reverse (3012121111001), we get a palindrome (4013232323104).

The spelling of 1001111212103 in words is "one trillion, one billion, one hundred eleven million, two hundred twelve thousand, one hundred three".