212043134440 has 32 divisors (see below), whose sum is σ = 477245097000. Its totient is φ = 84790934784.

The previous prime is 212043134437. The next prime is 212043134461. The reversal of 212043134440 is 44431340212.

It can be written as a sum of positive squares in 4 ways, for example, as 107257560004 + 104785574436 = 327502^2 + 323706^2 .

It is a super-2 number, since 2×212043134440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212043134399 and 212043134408.

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, 691695 + ... + 950014.

Almost surely, 2^212043134440 is an apocalyptic number.

212043134440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212043134440 is an abundant number, since it is smaller than the sum of its proper divisors (265201962560).

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

212043134440 is a wasteful number, since it uses less digits than its factorization.

212043134440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644949 (or 1644945 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 212043134440 its reverse (44431340212), we get a palindrome (256474474652).

The spelling of 212043134440 in words is "two hundred twelve billion, forty-three million, one hundred thirty-four thousand, four hundred forty".