21002022033 has 8 divisors (see below), whose sum is σ = 28128269568. Its totient is φ = 13938561264.

The previous prime is 21002021981. The next prime is 21002022059. The reversal of 21002022033 is 33022020012.

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

It is not a de Polignac number, because 21002022033 - 2¹⁷ = 21001890961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002022133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15695910 + ... + 15697247.

It is an arithmetic number, because the mean of its divisors is an integer number (3516033696).

Almost surely, 2^21002022033 is an apocalyptic number.

It is an amenable number.

21002022033 is a deficient number, since it is larger than the sum of its proper divisors (7126247535).

21002022033 is a wasteful number, since it uses less digits than its factorization.

21002022033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31393383.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21002022033 its reverse (33022020012), we get a palindrome (54024042045).

The spelling of 21002022033 in words is "twenty-one billion, two million, twenty-two thousand, thirty-three".