11131221003 has 32 divisors (see below), whose sum is σ = 18470284800. Its totient is φ = 5818127616.

The previous prime is 11131220987. The next prime is 11131221037. The reversal of 11131221003 is 30012213111.

It is a happy number.

It is not a de Polignac number, because 11131221003 - 2⁴ = 11131220987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11131221083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469426 + ... + 492567.

It is an arithmetic number, because the mean of its divisors is an integer number (577196400).

Almost surely, 2^11131221003 is an apocalyptic number.

11131221003 is a deficient number, since it is larger than the sum of its proper divisors (7339063797).

11131221003 is a wasteful number, since it uses less digits than its factorization.

11131221003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962051.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11131221003 its reverse (30012213111), we get a palindrome (41143434114).

The spelling of 11131221003 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-one thousand, three".