1100940021 has 24 divisors (see below), whose sum is σ = 1648253880. Its totient is φ = 707285376.

The previous prime is 1100940007. The next prime is 1100940041. The reversal of 1100940021 is 1200490011.

It can be written as a sum of positive squares in 4 ways, for example, as 283551921 + 817388100 = 16839^2 + 28590^2 .

It is not a de Polignac number, because 1100940021 - 2⁵ = 1100939989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100939976 and 1100940003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100940041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141591 + ... + 149163.

It is an arithmetic number, because the mean of its divisors is an integer number (68677245).

Almost surely, 2^1100940021 is an apocalyptic number.

It is an amenable number.

1100940021 is a deficient number, since it is larger than the sum of its proper divisors (547313859).

1100940021 is a wasteful number, since it uses less digits than its factorization.

1100940021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8165 (or 8162 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1100940021 is about 33180.4162270457. The cubic root of 1100940021 is about 1032.5740817304.

The spelling of 1100940021 in words is "one billion, one hundred million, nine hundred forty thousand, twenty-one".