20021331001333 has 4 divisors (see below), whose sum is σ = 20022556388320. Its totient is φ = 20020105614348.

The previous prime is 20021331001241. The next prime is 20021331001349. The reversal of 20021331001333 is 33310013312002.

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 a de Polignac number, because none of the positive numbers 2^k-20021331001333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021331001933) 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, 612668985 + ... + 612701662.

It is an arithmetic number, because the mean of its divisors is an integer number (5005639097080).

Almost surely, 2^{20021331001333} is an apocalyptic number.

It is an amenable number.

20021331001333 is a deficient number, since it is larger than the sum of its proper divisors (1225386987).

20021331001333 is a wasteful number, since it uses less digits than its factorization.

20021331001333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225386986.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20021331001333 its reverse (33310013312002), we get a palindrome (53331344313335).

The spelling of 20021331001333 in words is "twenty trillion, twenty-one billion, three hundred thirty-one million, one thousand, three hundred thirty-three".