21001022330332 has 24 divisors (see below), whose sum is σ = 40092993263232. Its totient is φ = 9545887705200.

The previous prime is 21001022330311. The next prime is 21001022330369. The reversal of 21001022330332 is 23303322010012.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17392657 + ... + 18560887.

It is an arithmetic number, because the mean of its divisors is an integer number (1670541385968).

Almost surely, 2^{21001022330332} is an apocalyptic number.

21001022330332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21001022330332 is a deficient number, since it is larger than the sum of its proper divisors (19091970932900).

21001022330332 is a wasteful number, since it uses less digits than its factorization.

21001022330332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576809 (or 1576807 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21001022330332 its reverse (23303322010012), we get a palindrome (44304344340344).

The spelling of 21001022330332 in words is "twenty-one trillion, one billion, twenty-two million, three hundred thirty thousand, three hundred thirty-two".