20021302331121 has 16 divisors (see below), whose sum is σ = 32855470492544. Its totient is φ = 10560686943744.

The previous prime is 20021302331071. The next prime is 20021302331143. The reversal of 20021302331121 is 12113320312002.

It is not a de Polignac number, because 20021302331121 - 2⁶ = 20021302331057 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20021302331161) 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, 36669051616 + ... + 36669052161.

It is an arithmetic number, because the mean of its divisors is an integer number (2053466905784).

Almost surely, 2^{20021302331121} is an apocalyptic number.

20021302331121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20021302331121 is a deficient number, since it is larger than the sum of its proper divisors (12834168161423).

20021302331121 is a wasteful number, since it uses less digits than its factorization.

20021302331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73338103800.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20021302331121 its reverse (12113320312002), we get a palindrome (32134622643123).

The spelling of 20021302331121 in words is "twenty trillion, twenty-one billion, three hundred two million, three hundred thirty-one thousand, one hundred twenty-one".