1131320011021 has 4 divisors (see below), whose sum is σ = 1134020059200. Its totient is φ = 1128619962844.

The previous prime is 1131320011007. The next prime is 1131320011039. The reversal of 1131320011021 is 1201100231311.

It is a happy number.

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 1131320011021 - 2¹³ = 1131320002829 is a prime.

It is a super-2 number, since 2×1131320011021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131320010986 and 1131320011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131320011091) 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, 1350023461 + ... + 1350024298.

It is an arithmetic number, because the mean of its divisors is an integer number (283505014800).

Almost surely, 2^{1131320011021} is an apocalyptic number.

It is an amenable number.

1131320011021 is a deficient number, since it is larger than the sum of its proper divisors (2700048179).

1131320011021 is an equidigital number, since it uses as much as digits as its factorization.

1131320011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700048178.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1131320011021 its reverse (1201100231311), we get a palindrome (2332420242332).

The spelling of 1131320011021 in words is "one trillion, one hundred thirty-one billion, three hundred twenty million, eleven thousand, twenty-one".