1130021231 has 4 divisors (see below), whose sum is σ = 1130365632. Its totient is φ = 1129676832.

The previous prime is 1130021227. The next prime is 1130021273. The reversal of 1130021231 is 1321200311.

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 1130021231 - 2² = 1130021227 is a prime.

It is a super-2 number, since 2×1130021231² = 2553895965021510722, which 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 (1130021281) 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, 167231 + ... + 173856.

It is an arithmetic number, because the mean of its divisors is an integer number (282591408).

Almost surely, 2^1130021231 is an apocalyptic number.

1130021231 is a deficient number, since it is larger than the sum of its proper divisors (344401).

1130021231 is an equidigital number, since it uses as much as digits as its factorization.

1130021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344400.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1130021231 is about 33615.7884185393. The cubic root of 1130021231 is about 1041.5869605089.

Adding to 1130021231 its reverse (1321200311), we get a palindrome (2451221542).

The spelling of 1130021231 in words is "one billion, one hundred thirty million, twenty-one thousand, two hundred thirty-one".