11133121031 has 4 divisors (see below), whose sum is σ = 11434016232. Its totient is φ = 10832225832.

The previous prime is 11133121001. The next prime is 11133121037. The reversal of 11133121031 is 13012133111.

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 11133121031 - 2¹⁸ = 11132858887 is a prime.

It is a super-2 number, since 2×11133121031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133121037) 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, 150447545 + ... + 150447618.

It is an arithmetic number, because the mean of its divisors is an integer number (2858504058).

Almost surely, 2^11133121031 is an apocalyptic number.

11133121031 is a deficient number, since it is larger than the sum of its proper divisors (300895201).

11133121031 is an equidigital number, since it uses as much as digits as its factorization.

11133121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300895200.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11133121031 its reverse (13012133111), we get a palindrome (24145254142).

The spelling of 11133121031 in words is "eleven billion, one hundred thirty-three million, one hundred twenty-one thousand, thirty-one".