20021020211320 has 128 divisors (see below), whose sum is σ = 46905614366400. Its totient is φ = 7684068519936.

The previous prime is 20021020211317. The next prime is 20021020211333. The reversal of 20021020211320 is 2311202012002.

It is a happy number.

It is a super-2 number, since 2×20021020211320² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20021020211294 and 20021020211303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1178599867 + ... + 1178616853.

Almost surely, 2^{20021020211320} is an apocalyptic number.

20021020211320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021020211320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23452807183200).

20021020211320 is an abundant number, since it is smaller than the sum of its proper divisors (26884594155080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021020211320 is a wasteful number, since it uses less digits than its factorization.

20021020211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28017 (or 28013 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20021020211320 its reverse (2311202012002), we get a palindrome (22332222223322).

The spelling of 20021020211320 in words is "twenty trillion, twenty-one billion, twenty million, two hundred eleven thousand, three hundred twenty".