20021101331 has 16 divisors (see below), whose sum is σ = 26429690880. Its totient is φ = 14683159680.

The previous prime is 20021101319. The next prime is 20021101333. The reversal of 20021101331 is 13310112002.

It is not a de Polignac number, because 20021101331 - 2⁶ = 20021101267 is a prime.

It is a super-2 number, since 2×20021101331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021101333) 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, 7646171 + ... + 7648788.

It is an arithmetic number, because the mean of its divisors is an integer number (1651855680).

Almost surely, 2^20021101331 is an apocalyptic number.

20021101331 is a deficient number, since it is larger than the sum of its proper divisors (6408589549).

20021101331 is a wasteful number, since it uses less digits than its factorization.

20021101331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15294994.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20021101331 its reverse (13310112002), we get a palindrome (33331213333).

The spelling of 20021101331 in words is "twenty billion, twenty-one million, one hundred one thousand, three hundred thirty-one".