212144040024021 has 24 divisors (see below), whose sum is σ = 350206446021120. Its totient is φ = 121225023218016.

The previous prime is 212144040023963. The next prime is 212144040024031. The reversal of 212144040024021 is 120420040441212.

212144040024021 is a `hidden beast` number, since 2 + 1 + 2 + 14 + 4 + 0 + 400 + 240 + 2 + 1 = 666.

It is not a de Polignac number, because 212144040024021 - 2¹¹ = 212144040021973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212144040024031) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 76601500 + ... + 79322618.

It is an arithmetic number, because the mean of its divisors is an integer number (14591935250880).

Almost surely, 2^{212144040024021} is an apocalyptic number.

212144040024021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212144040024021 is a deficient number, since it is larger than the sum of its proper divisors (138062405997099).

212144040024021 is a wasteful number, since it uses less digits than its factorization.

212144040024021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958625 (or 3958622 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 212144040024021 its reverse (120420040441212), we get a palindrome (332564080465233).

The spelling of 212144040024021 in words is "two hundred twelve trillion, one hundred forty-four billion, forty million, twenty-four thousand, twenty-one".