21001131013332 has 24 divisors (see below), whose sum is σ = 49251383397216. Its totient is φ = 6964842095008.

The previous prime is 21001131013321. The next prime is 21001131013333. The reversal of 21001131013332 is 23331013110012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21001131013299 and 21001131013308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001131013333) 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, 4441861218 + ... + 4441865945.

It is an arithmetic number, because the mean of its divisors is an integer number (2052140974884).

Almost surely, 2^{21001131013332} is an apocalyptic number.

It is an amenable number.

21001131013332 is an abundant number, since it is smaller than the sum of its proper divisors (28250252383884).

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

21001131013332 is a wasteful number, since it uses less digits than its factorization.

21001131013332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883727367 (or 8883727365 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21001131013332 its reverse (23331013110012), we get a palindrome (44332144123344).

The spelling of 21001131013332 in words is "twenty-one trillion, one billion, one hundred thirty-one million, thirteen thousand, three hundred thirty-two".