1211131 has 8 divisors (see below), whose sum is σ = 1292544. Its totient is φ = 1130880.

The previous prime is 1211087. The next prime is 1211141. The reversal of 1211131 is 1311121.

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 1211131 - 2¹¹ = 1209083 is a prime.

It is a super-2 number, since 2×1211131² = 2933676598322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211141) 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, 3061 + ... + 3433.

It is an arithmetic number, because the mean of its divisors is an integer number (161568).

2^1211131 is an apocalyptic number.

1211131 is a deficient number, since it is larger than the sum of its proper divisors (81413).

1211131 is a wasteful number, since it uses less digits than its factorization.

1211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its digits is 6, while the sum is 10.

The square root of 1211131 is about 1100.5139708336. The cubic root of 1211131 is about 106.5934143329.

Subtracting from 1211131 its sum of digits (10), we obtain a palindrome (1211121).

Adding to 1211131 its reverse (1311121), we get a palindrome (2522252).

The spelling of 1211131 in words is "one million, two hundred eleven thousand, one hundred thirty-one".