1161121244 has 24 divisors (see below), whose sum is σ = 2137097088. Its totient is φ = 551229120.

The previous prime is 1161121243. The next prime is 1161121253. The reversal of 1161121244 is 4421211611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161121243) 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, 81767 + ... + 94910.

It is an arithmetic number, because the mean of its divisors is an integer number (89045712).

Almost surely, 2^1161121244 is an apocalyptic number.

It is an amenable number.

1161121244 is a deficient number, since it is larger than the sum of its proper divisors (975975844).

1161121244 is a wasteful number, since it uses less digits than its factorization.

1161121244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176765 (or 176763 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 1161121244 is about 34075.2291848492. The cubic root of 1161121244 is about 1051.0560030608.

Adding to 1161121244 its reverse (4421211611), we get a palindrome (5582332855).

The spelling of 1161121244 in words is "one billion, one hundred sixty-one million, one hundred twenty-one thousand, two hundred forty-four".