1131011021 has 8 divisors (see below), whose sum is σ = 1307108160. Its totient is φ = 958544928.

The previous prime is 1131011017. The next prime is 1131011023. The reversal of 1131011021 is 1201101311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131011021 - 2² = 1131011017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131010993 and 1131011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131011023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907091 + ... + 908336.

It is an arithmetic number, because the mean of its divisors is an integer number (163388520).

Almost surely, 2^1131011021 is an apocalyptic number.

It is an amenable number.

1131011021 is a deficient number, since it is larger than the sum of its proper divisors (176097139).

1131011021 is an equidigital number, since it uses as much as digits as its factorization.

1131011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815523.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1131011021 is about 33630.5072962035. The cubic root of 1131011021 is about 1041.8909817876.

Adding to 1131011021 its reverse (1201101311), we get a palindrome (2332112332).

The spelling of 1131011021 in words is "one billion, one hundred thirty-one million, eleven thousand, twenty-one".