1311121003 has 16 divisors (see below), whose sum is σ = 1391040000. Its totient is φ = 1233207360.

The previous prime is 1311120983. The next prime is 1311121027. The reversal of 1311121003 is 3001211131.

It is a cyclic number.

It is not a de Polignac number, because 1311121003 - 2¹⁷ = 1310989931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311121043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814063 + ... + 815671.

It is an arithmetic number, because the mean of its divisors is an integer number (86940000).

Almost surely, 2^1311121003 is an apocalyptic number.

1311121003 is a deficient number, since it is larger than the sum of its proper divisors (79918997).

1311121003 is a wasteful number, since it uses less digits than its factorization.

1311121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1311121003 is about 36209.4048970706. The cubic root of 1311121003 is about 1094.4962002038.

Adding to 1311121003 its reverse (3001211131), we get a palindrome (4312332134).

The spelling of 1311121003 in words is "one billion, three hundred eleven million, one hundred twenty-one thousand, three".