21023121233332 has 48 divisors (see below), whose sum is σ = 39909682435392. Its totient is φ = 9651242119680.

The previous prime is 21023121233329. The next prime is 21023121233353. The reversal of 21023121233332 is 23333212132012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21023121233332.

It is a congruent number.

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, 2061343 + ... + 6804070.

It is an arithmetic number, because the mean of its divisors is an integer number (831451717404).

Almost surely, 2^{21023121233332} is an apocalyptic number.

It is an amenable number.

21023121233332 is a deficient number, since it is larger than the sum of its proper divisors (18886561202060).

21023121233332 is a wasteful number, since it uses less digits than its factorization.

21023121233332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8866288 (or 8866286 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21023121233332 its reverse (23333212132012), we get a palindrome (44356333365344).

The spelling of 21023121233332 in words is "twenty-one trillion, twenty-three billion, one hundred twenty-one million, two hundred thirty-three thousand, three hundred thirty-two".