1131121220213 has 4 divisors (see below), whose sum is σ = 1132161811200. Its totient is φ = 1130080629228.

The previous prime is 1131121220183. The next prime is 1131121220221. The reversal of 1131121220213 is 3120221211311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131121220213 - 2⁶ = 1131121220149 is a prime.

It is a super-2 number, since 2×1131121220213² (a number of 25 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 (1131121220113) 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, 520293863 + ... + 520296036.

It is an arithmetic number, because the mean of its divisors is an integer number (283040452800).

Almost surely, 2^{1131121220213} is an apocalyptic number.

It is an amenable number.

1131121220213 is a deficient number, since it is larger than the sum of its proper divisors (1040590987).

1131121220213 is a wasteful number, since it uses less digits than its factorization.

1131121220213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040590986.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1131121220213 its reverse (3120221211311), we get a palindrome (4251342431524).

The spelling of 1131121220213 in words is "one trillion, one hundred thirty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred thirteen".