21213020302032 has 40 divisors (see below), whose sum is σ = 59015710329184. Its totient is φ = 6527083169664.

The previous prime is 21213020302031. The next prime is 21213020302139. The reversal of 21213020302032 is 23020302031212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213020302031) 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, 16997611798 + ... + 16997613045.

Almost surely, 2^{21213020302032} is an apocalyptic number.

It is an amenable number.

21213020302032 is an abundant number, since it is smaller than the sum of its proper divisors (37802690027152).

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

21213020302032 is a wasteful number, since it uses less digits than its factorization.

21213020302032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33995224867 (or 33995224861 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21213020302032 its reverse (23020302031212), we get a palindrome (44233322333244).

The spelling of 21213020302032 in words is "twenty-one trillion, two hundred thirteen billion, twenty million, three hundred two thousand, thirty-two".