11131213001 has 4 divisors (see below), whose sum is σ = 11256282900. Its totient is φ = 11006143104.

The previous prime is 11131212979. The next prime is 11131213003. The reversal of 11131213001 is 10031213111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10031213111 = 84751 ⋅118361.

It can be written as a sum of positive squares in 2 ways, for example, as 6512651401 + 4618561600 = 80701^2 + 67960^2 .

It is a cyclic number.

It is not a de Polignac number, because 11131213001 - 2¹⁰ = 11131211977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131213003) 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, 62534816 + ... + 62534993.

It is an arithmetic number, because the mean of its divisors is an integer number (2814070725).

Almost surely, 2^11131213001 is an apocalyptic number.

It is an amenable number.

11131213001 is a deficient number, since it is larger than the sum of its proper divisors (125069899).

11131213001 is an equidigital number, since it uses as much as digits as its factorization.

11131213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125069898.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11131213001 its reverse (10031213111), we get a palindrome (21162426112).

The spelling of 11131213001 in words is "eleven billion, one hundred thirty-one million, two hundred thirteen thousand, one".