21023211112033 has 8 divisors (see below), whose sum is σ = 22640648455208. Its totient is φ = 19405811948544.

The previous prime is 21023211112021. The next prime is 21023211112109. The reversal of 21023211112033 is 33021111232012.

It can be written as a sum of positive squares in 4 ways, for example, as 519766018704 + 20503445093329 = 720948^2 + 4528073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21023211112033 - 2²¹ = 21023209014881 is a prime.

It is a super-2 number, since 2×21023211112033² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21023211111995 and 21023211112013.

It is not an unprimeable number, because it can be changed into a prime (21023211112933) 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, 8396160 + ... + 10608577.

It is an arithmetic number, because the mean of its divisors is an integer number (2830081056901).

Almost surely, 2^{21023211112033} is an apocalyptic number.

It is an amenable number.

21023211112033 is a deficient number, since it is larger than the sum of its proper divisors (1617437343175).

21023211112033 is a wasteful number, since it uses less digits than its factorization.

21023211112033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19089843.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21023211112033 its reverse (33021111232012), we get a palindrome (54044322344045).

The spelling of 21023211112033 in words is "twenty-one trillion, twenty-three billion, two hundred eleven million, one hundred twelve thousand, thirty-three".