120021143240 has 16 divisors (see below), whose sum is σ = 270047572380. Its totient is φ = 48008457280.

The previous prime is 120021143239. The next prime is 120021143257. The reversal of 120021143240 is 42341120021.

It can be written as a sum of positive squares in 2 ways, for example, as 118224570244 + 1796572996 = 343838^2 + 42386^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500264251 + ... + 1500264330.

Almost surely, 2^120021143240 is an apocalyptic number.

120021143240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021143240 is an abundant number, since it is smaller than the sum of its proper divisors (150026429140).

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

120021143240 is a wasteful number, since it uses less digits than its factorization.

120021143240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000528592 (or 3000528588 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 120021143240 its reverse (42341120021), we get a palindrome (162362263261).

The spelling of 120021143240 in words is "one hundred twenty billion, twenty-one million, one hundred forty-three thousand, two hundred forty".