212024140040 has 32 divisors (see below), whose sum is σ = 477350216280. Its totient is φ = 84757051392.

The previous prime is 212024140007. The next prime is 212024140051. The reversal of 212024140040 is 40041420212.

It can be written as a sum of positive squares in 4 ways, for example, as 201182749156 + 10841390884 = 448534^2 + 104122^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 212024139994 and 212024140021.

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, 1578569 + ... + 1707608.

Almost surely, 2^212024140040 is an apocalyptic number.

212024140040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212024140040 is an abundant number, since it is smaller than the sum of its proper divisors (265326076240).

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

212024140040 is a wasteful number, since it uses less digits than its factorization.

212024140040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287801 (or 3287797 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 212024140040 its reverse (40041420212), we get a palindrome (252065560252).

The spelling of 212024140040 in words is "two hundred twelve billion, twenty-four million, one hundred forty thousand, forty".