21001202033 has 8 divisors (see below), whose sum is σ = 24002300352. Its totient is φ = 18000335376.

The previous prime is 21001202011. The next prime is 21001202039. The reversal of 21001202033 is 33020210012.

It is a happy number.

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 21001202033 - 2¹² = 21001197937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001201999 and 21001202017.

It is not an unprimeable number, because it can be changed into a prime (21001202039) 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, 235391 + ... + 312107.

It is an arithmetic number, because the mean of its divisors is an integer number (3000287544).

Almost surely, 2^21001202033 is an apocalyptic number.

It is an amenable number.

21001202033 is a deficient number, since it is larger than the sum of its proper divisors (3001098319).

21001202033 is an equidigital number, since it uses as much as digits as its factorization.

21001202033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115831.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21001202033 its reverse (33020210012), we get a palindrome (54021412045).

The spelling of 21001202033 in words is "twenty-one billion, one million, two hundred two thousand, thirty-three".