20333002120221 has 16 divisors (see below), whose sum is σ = 31739320384128. Its totient is φ = 11335471564800.

The previous prime is 20333002120219. The next prime is 20333002120237. The reversal of 20333002120221 is 12202120033302.

It is a happy number.

It is not a de Polignac number, because 20333002120221 - 2¹ = 20333002120219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20333002120201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11807782020 + ... + 11807783741.

It is an arithmetic number, because the mean of its divisors is an integer number (1983707524008).

Almost surely, 2^{20333002120221} is an apocalyptic number.

20333002120221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20333002120221 is a deficient number, since it is larger than the sum of its proper divisors (11406318263907).

20333002120221 is a wasteful number, since it uses less digits than its factorization.

20333002120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23615565812.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20333002120221 its reverse (12202120033302), we get a palindrome (32535122153523).

The spelling of 20333002120221 in words is "twenty trillion, three hundred thirty-three billion, two million, one hundred twenty thousand, two hundred twenty-one".