1211140040 has 32 divisors (see below), whose sum is σ = 2972799360. Its totient is φ = 440414400.

The previous prime is 1211140001. The next prime is 1211140103. The reversal of 1211140040 is 400411121.

It is a junction number, because it is equal to n+sod(n) for n = 1211139997 and 1211140024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375856 + ... + 1376735.

It is an arithmetic number, because the mean of its divisors is an integer number (92899980).

Almost surely, 2^1211140040 is an apocalyptic number.

1211140040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211140040 is an abundant number, since it is smaller than the sum of its proper divisors (1761659320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211140040 is a wasteful number, since it uses less digits than its factorization.

1211140040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752613 (or 2752609 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1211140040 is about 34801.4373266393. The cubic root of 1211140040 is about 1065.9367954012.

Adding to 1211140040 its reverse (400411121), we get a palindrome (1611551161).

The spelling of 1211140040 in words is "one billion, two hundred eleven million, one hundred forty thousand, forty".