21020021212332 has 48 divisors (see below), whose sum is σ = 49376868760800. Its totient is φ = 6959510948352.

The previous prime is 21020021212321. The next prime is 21020021212349. The reversal of 21020021212332 is 23321212002012.

It is a junction number, because it is equal to n+sod(n) for n = 21020021212299 and 21020021212308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131511568 + ... + 131671304.

It is an arithmetic number, because the mean of its divisors is an integer number (1028684765850).

Almost surely, 2^{21020021212332} is an apocalyptic number.

It is an amenable number.

21020021212332 is an abundant number, since it is smaller than the sum of its proper divisors (28356847548468).

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

21020021212332 is a wasteful number, since it uses less digits than its factorization.

21020021212332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233490 (or 233488 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21020021212332 its reverse (23321212002012), we get a palindrome (44341233214344).

The spelling of 21020021212332 in words is "twenty-one trillion, twenty billion, twenty-one million, two hundred twelve thousand, three hundred thirty-two".