1211112103 has 2 divisors, whose sum is σ = 1211112104. Its totient is φ = 1211112102.

The previous prime is 1211112101. The next prime is 1211112139. The reversal of 1211112103 is 3012111121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211112103 - 2¹ = 1211112101 is a prime.

Together with 1211112101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211112101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605556051 + 605556052.

It is an arithmetic number, because the mean of its divisors is an integer number (605556052).

Almost surely, 2^1211112103 is an apocalyptic number.

1211112103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211112103 is an equidigital number, since it uses as much as digits as its factorization.

1211112103 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 1211112103 is about 34801.0359472243. The cubic root of 1211112103 is about 1065.9285994579.

Adding to 1211112103 its reverse (3012111121), we get a palindrome (4223223224).

The spelling of 1211112103 in words is "one billion, two hundred eleven million, one hundred twelve thousand, one hundred three".