1211144023 has 16 divisors (see below), whose sum is σ = 1272499200. Its totient is φ = 1151186400.

The previous prime is 1211144003. The next prime is 1211144041. The reversal of 1211144023 is 3204411121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211144023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211144003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1151848 + ... + 1152898.

It is an arithmetic number, because the mean of its divisors is an integer number (79531200).

Almost surely, 2^1211144023 is an apocalyptic number.

1211144023 is a deficient number, since it is larger than the sum of its proper divisors (61355177).

1211144023 is a wasteful number, since it uses less digits than its factorization.

1211144023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1211144023 is about 34801.4945512402. The cubic root of 1211144023 is about 1065.9379638930.

Adding to 1211144023 its reverse (3204411121), we get a palindrome (4415555144).

The spelling of 1211144023 in words is "one billion, two hundred eleven million, one hundred forty-four thousand, twenty-three".