21211302033 has 32 divisors (see below), whose sum is σ = 33287932800. Its totient is φ = 13302931968.

The previous prime is 21211302031. The next prime is 21211302037. The reversal of 21211302033 is 33020311212.

It is not a de Polignac number, because 21211302033 - 2¹ = 21211302031 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21211301997 and 21211302015.

It is not an unprimeable number, because it can be changed into a prime (21211302031) 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, 1119285 + ... + 1138077.

It is an arithmetic number, because the mean of its divisors is an integer number (1040247900).

Almost surely, 2^21211302033 is an apocalyptic number.

It is an amenable number.

21211302033 is a deficient number, since it is larger than the sum of its proper divisors (12076630767).

21211302033 is a wasteful number, since it uses less digits than its factorization.

21211302033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21278 (or 21272 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21211302033 its reverse (33020311212), we get a palindrome (54231613245).

The spelling of 21211302033 in words is "twenty-one billion, two hundred eleven million, three hundred two thousand, thirty-three".