21214036424212 has 48 divisors (see below), whose sum is σ = 38019626444800. Its totient is φ = 10351700892288.

The previous prime is 21214036424179. The next prime is 21214036424213. The reversal of 21214036424212 is 21242463041212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036424213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2269118914 + ... + 2269128262.

Almost surely, 2^{21214036424212} is an apocalyptic number.

It is an amenable number.

21214036424212 is a deficient number, since it is larger than the sum of its proper divisors (16805590020588).

21214036424212 is a wasteful number, since it uses less digits than its factorization.

21214036424212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18992 (or 18990 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 21214036424212 its reverse (21242463041212), we get a palindrome (42456499465424).

The spelling of 21214036424212 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, four hundred twenty-four thousand, two hundred twelve".