212011032440 has 16 divisors (see below), whose sum is σ = 477024823080. Its totient is φ = 84804412960.

The previous prime is 212011032439. The next prime is 212011032463. The reversal of 212011032440 is 44230110212.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2650137866 + ... + 2650137945.

Almost surely, 2^212011032440 is an apocalyptic number.

212011032440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212011032440 is an abundant number, since it is smaller than the sum of its proper divisors (265013790640).

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

212011032440 is a wasteful number, since it uses less digits than its factorization.

212011032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300275822 (or 5300275818 counting only the distinct ones).

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

Adding to 212011032440 its reverse (44230110212), we get a palindrome (256241142652).

The spelling of 212011032440 in words is "two hundred twelve billion, eleven million, thirty-two thousand, four hundred forty".