20021220121120 has 96 divisors (see below), whose sum is σ = 47353180428288. Its totient is φ = 7999509500928.

The previous prime is 20021220121087. The next prime is 20021220121121. The reversal of 20021220121120 is 2112102212002.

It is a happy number.

20021220121120 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20021220121094 and 20021220121103.

It is not an unprimeable number, because it can be changed into a prime (20021220121121) 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, 1253433454 + ... + 1253449426.

It is an arithmetic number, because the mean of its divisors is an integer number (493262296128).

Almost surely, 2^{20021220121120} is an apocalyptic number.

20021220121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021220121120 is an abundant number, since it is smaller than the sum of its proper divisors (27331960307168).

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

20021220121120 is a wasteful number, since it uses less digits than its factorization.

20021220121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24282 (or 24274 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021220121120 its reverse (2112102212002), we get a palindrome (22133322333122).

The spelling of 20021220121120 in words is "twenty trillion, twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred twenty".