2120021240 has 32 divisors (see below), whose sum is σ = 4800444480. Its totient is φ = 842604672.

The previous prime is 2120021237. The next prime is 2120021257. The reversal of 2120021240 is 421200212.

It is a super-2 number, since 2×2120021240² = 8988980116102275200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162512 + ... + 175071.

It is an arithmetic number, because the mean of its divisors is an integer number (150013890).

Almost surely, 2^2120021240 is an apocalyptic number.

2120021240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120021240 is an abundant number, since it is smaller than the sum of its proper divisors (2680423240).

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

2120021240 is a wasteful number, since it uses less digits than its factorization.

2120021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337751 (or 337747 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2120021240 is about 46043.6883839685. The cubic root of 2120021240 is about 1284.6359478831.

Adding to 2120021240 its reverse (421200212), we get a palindrome (2541221452).

The spelling of 2120021240 in words is "two billion, one hundred twenty million, twenty-one thousand, two hundred forty".