2231211131 has 4 divisors (see below), whose sum is σ = 2232984600. Its totient is φ = 2229437664.

The previous prime is 2231211127. The next prime is 2231211233. The reversal of 2231211131 is 1311121322.

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 2231211131 - 2² = 2231211127 is a prime.

It is a super-3 number, since 3×2231211131³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231411131) 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, 884846 + ... + 887363.

It is an arithmetic number, because the mean of its divisors is an integer number (558246150).

Almost surely, 2^2231211131 is an apocalyptic number.

2231211131 is a deficient number, since it is larger than the sum of its proper divisors (1773469).

2231211131 is a wasteful number, since it uses less digits than its factorization.

2231211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773468.

The product of its digits is 72, while the sum is 17.

The square root of 2231211131 is about 47235.6976343104. The cubic root of 2231211131 is about 1306.7130326879.

Adding to 2231211131 its reverse (1311121322), we get a palindrome (3542332453).

The spelling of 2231211131 in words is "two billion, two hundred thirty-one million, two hundred eleven thousand, one hundred thirty-one".