1211000103 has 6 divisors (see below), whose sum is σ = 1749222384. Its totient is φ = 807333396.

The previous prime is 1211000081. The next prime is 1211000159. The reversal of 1211000103 is 3010001121.

It is not a de Polignac number, because 1211000103 - 2²⁸ = 942564647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 134555567 = 1211000103 / (1 + 2 + 1 + 1 + 0 + 0 + 0 + 1 + 0 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211000803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67277775 + ... + 67277792.

It is an arithmetic number, because the mean of its divisors is an integer number (291537064).

Almost surely, 2^1211000103 is an apocalyptic number.

1211000103 is a deficient number, since it is larger than the sum of its proper divisors (538222281).

1211000103 is a wasteful number, since it uses less digits than its factorization.

1211000103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134555573 (or 134555570 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1211000103 is about 34799.4267625201. The cubic root of 1211000103 is about 1065.8957404894.

Adding to 1211000103 its reverse (3010001121), we get a palindrome (4221001224).

The spelling of 1211000103 in words is "one billion, two hundred eleven million, one hundred three", and thus it is an aban number.