21421433032212 has 24 divisors (see below), whose sum is σ = 50498635948096. Its totient is φ = 7066864505088.

The previous prime is 21421433032183. The next prime is 21421433032213. The reversal of 21421433032212 is 21223033412412.

It is a happy number.

It is a super-2 number, since 2×21421433032212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21421433032212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421433032213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9201645328 + ... + 9201647655.

Almost surely, 2^{21421433032212} is an apocalyptic number.

It is an amenable number.

21421433032212 is an abundant number, since it is smaller than the sum of its proper divisors (29077202915884).

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

21421433032212 is a wasteful number, since it uses less digits than its factorization.

21421433032212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18403293087 (or 18403293085 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21421433032212 its reverse (21223033412412), we get a palindrome (42644466444624).

The spelling of 21421433032212 in words is "twenty-one trillion, four hundred twenty-one billion, four hundred thirty-three million, thirty-two thousand, two hundred twelve".