21333012022021 has 32 divisors (see below), whose sum is σ = 25613920051200. Its totient is φ = 17371293124416.

The previous prime is 21333012022009. The next prime is 21333012022051. The reversal of 21333012022021 is 12022021033312.

It is not a de Polignac number, because 21333012022021 - 2³⁵ = 21298652283653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21333012021983 and 21333012022001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333012022051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274563240 + ... + 274640926.

It is an arithmetic number, because the mean of its divisors is an integer number (800435001600).

Almost surely, 2^{21333012022021} is an apocalyptic number.

It is an amenable number.

21333012022021 is a deficient number, since it is larger than the sum of its proper divisors (4280908029179).

21333012022021 is a wasteful number, since it uses less digits than its factorization.

21333012022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89313.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21333012022021 its reverse (12022021033312), we get a palindrome (33355033055333).

The spelling of 21333012022021 in words is "twenty-one trillion, three hundred thirty-three billion, twelve million, twenty-two thousand, twenty-one".