20021220011120 has 80 divisors (see below), whose sum is σ = 46959863920992. Its totient is φ = 7938139376640.

The previous prime is 20021220011113. The next prime is 20021220011123. The reversal of 20021220011120 is 2111002212002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 20021220011095 and 20021220011104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021220011123) 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, 2395814 + ... + 6766266.

Almost surely, 2^{20021220011120} is an apocalyptic number.

20021220011120 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 20021220011120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23479931960496).

20021220011120 is an abundant number, since it is smaller than the sum of its proper divisors (26938643909872).

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

20021220011120 is a wasteful number, since it uses less digits than its factorization.

20021220011120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370970 (or 4370964 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021220011120 its reverse (2111002212002), we get a palindrome (22132222223122).

The spelling of 20021220011120 in words is "twenty trillion, twenty-one billion, two hundred twenty million, eleven thousand, one hundred twenty".