2111205240 has 48 divisors (see below), whose sum is σ = 6861418200. Its totient is φ = 562987968.

The previous prime is 2111205227. The next prime is 2111205263. The reversal of 2111205240 is 425021112.

2111205240 is a `hidden beast` number, since 21 + 1 + 120 + 524 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2931870 + ... + 2932589.

Almost surely, 2^2111205240 is an apocalyptic number.

2111205240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111205240 is an abundant number, since it is smaller than the sum of its proper divisors (4750212960).

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

2111205240 is a wasteful number, since it uses less digits than its factorization.

2111205240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5864476 (or 5864469 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2111205240 is about 45947.8534863164. The cubic root of 2111205240 is about 1282.8527762020.

Adding to 2111205240 its reverse (425021112), we get a palindrome (2536226352).

The spelling of 2111205240 in words is "two billion, one hundred eleven million, two hundred five thousand, two hundred forty".