1131121003 has 4 divisors (see below), whose sum is σ = 1131286968. Its totient is φ = 1130955040.

The previous prime is 1131120983. The next prime is 1131121009. The reversal of 1131121003 is 3001211311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131121003 - 2¹³ = 1131112811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131121009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72301 + ... + 86542.

It is an arithmetic number, because the mean of its divisors is an integer number (282821742).

Almost surely, 2^1131121003 is an apocalyptic number.

1131121003 is a deficient number, since it is larger than the sum of its proper divisors (165965).

1131121003 is an equidigital number, since it uses as much as digits as its factorization.

1131121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165964.

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

The square root of 1131121003 is about 33632.1424087137. The cubic root of 1131121003 is about 1041.9247526167.

Adding to 1131121003 its reverse (3001211311), we get a palindrome (4132332314).

The spelling of 1131121003 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, three".