1121211131 has 8 divisors (see below), whose sum is σ = 1179218304. Its totient is φ = 1064568960.

The previous prime is 1121211127. The next prime is 1121211229. The reversal of 1121211131 is 1311121211.

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 1121211131 - 2² = 1121211127 is a prime.

It is a super-2 number, since 2×1121211131² = 2514228800556598322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121211101) 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, 339566 + ... + 342851.

It is an arithmetic number, because the mean of its divisors is an integer number (147402288).

Almost surely, 2^1121211131 is an apocalyptic number.

1121211131 is a deficient number, since it is larger than the sum of its proper divisors (58007173).

1121211131 is an equidigital number, since it uses as much as digits as its factorization.

1121211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682501.

The product of its digits is 12, while the sum is 14.

The square root of 1121211131 is about 33484.4909025059. The cubic root of 1121211131 is about 1038.8730182931.

Adding to 1121211131 its reverse (1311121211), we get a palindrome (2432332342).

It can be divided in two parts, 1121211 and 131, that multiplied together give a palindrome (146878641).

The spelling of 1121211131 in words is "one billion, one hundred twenty-one million, two hundred eleven thousand, one hundred thirty-one".