212144034140240 has 40 divisors (see below), whose sum is σ = 493237967607528. Its totient is φ = 84857082347520.

The previous prime is 212144034140237. The next prime is 212144034140261. The reversal of 212144034140240 is 42041430441212.

It can be written as a sum of positive squares in 4 ways, for example, as 68556346575376 + 143587687564864 = 8279876^2 + 11982808^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 212144034140197 and 212144034140206.

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, 4681424 + ... + 21123536.

Almost surely, 2^{212144034140240} is an apocalyptic number.

212144034140240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212144034140240 is an abundant number, since it is smaller than the sum of its proper divisors (281093933467288).

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

212144034140240 is a wasteful number, since it uses less digits than its factorization.

212144034140240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16603407 (or 16603401 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 212144034140240 its reverse (42041430441212), we get a palindrome (254185464581452).

The spelling of 212144034140240 in words is "two hundred twelve trillion, one hundred forty-four billion, thirty-four million, one hundred forty thousand, two hundred forty".