21214024234132 has 12 divisors (see below), whose sum is σ = 37124575396020. Its totient is φ = 10607002692416.

The previous prime is 21214024234097. The next prime is 21214024234133. The reversal of 21214024234132 is 23143242041212.

It can be written as a sum of positive squares in 2 ways, for example, as 13164967262736 + 8049056971396 = 3628356^2 + 2837086^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21214024234094 and 21214024234103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214024234133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6005598 + ... + 8859754.

It is an arithmetic number, because the mean of its divisors is an integer number (3093714616335).

Almost surely, 2^{21214024234132} is an apocalyptic number.

It is an amenable number.

21214024234132 is a deficient number, since it is larger than the sum of its proper divisors (15910551161888).

21214024234132 is a wasteful number, since it uses less digits than its factorization.

21214024234132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712330 (or 4712328 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21214024234132 its reverse (23143242041212), we get a palindrome (44357266275344).

The spelling of 21214024234132 in words is "twenty-one trillion, two hundred fourteen billion, twenty-four million, two hundred thirty-four thousand, one hundred thirty-two".