21021210000033 has 4 divisors (see below), whose sum is σ = 28028280000048. Its totient is φ = 14014140000020.

The previous prime is 21021209999903. The next prime is 21021210000083. The reversal of 21021210000033 is 33000001212012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21021210000033 - 2¹⁸ = 21021209737889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021209999967 and 21021210000021.

It is not an unprimeable number, because it can be changed into a prime (21021210000083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503535000003 + ... + 3503535000008.

It is an arithmetic number, because the mean of its divisors is an integer number (7007070000012).

Almost surely, 2^{21021210000033} is an apocalyptic number.

It is an amenable number.

21021210000033 is a deficient number, since it is larger than the sum of its proper divisors (7007070000015).

21021210000033 is an equidigital number, since it uses as much as digits as its factorization.

21021210000033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007070000014.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21021210000033 its reverse (33000001212012), we get a palindrome (54021211212045).

The spelling of 21021210000033 in words is "twenty-one trillion, twenty-one billion, two hundred ten million, thirty-three", and thus it is an aban number.