20120220021020 has 96 divisors (see below), whose sum is σ = 50585975193600. Its totient is φ = 6576176565504.

The previous prime is 20120220021019. The next prime is 20120220021071. The reversal of 20120220021020 is 2012002202102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20120220020986 and 20120220021004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31044572 + ... + 31686051.

It is an arithmetic number, because the mean of its divisors is an integer number (526937241600).

Almost surely, 2^{20120220021020} is an apocalyptic number.

20120220021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120220021020 is an abundant number, since it is smaller than the sum of its proper divisors (30465755172580).

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

20120220021020 is a wasteful number, since it uses less digits than its factorization.

20120220021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62730747 (or 62730745 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20120220021020 its reverse (2012002202102), we get a palindrome (22132222223122).

The spelling of 20120220021020 in words is "twenty trillion, one hundred twenty billion, two hundred twenty million, twenty-one thousand, twenty".