20112120021020 has 24 divisors (see below), whose sum is σ = 42238463215200. Its totient is φ = 8044274452032.

The previous prime is 20112120021011. The next prime is 20112120021029. The reversal of 20112120021020 is 2012002121102.

It is an interprime number because it is at equal distance from previous prime (20112120021011) and next prime (20112120021029).

It is a junction number, because it is equal to n+sod(n) for n = 20112120020986 and 20112120021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112120021029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35559680 + ... + 36120839.

It is an arithmetic number, because the mean of its divisors is an integer number (1759935967300).

Almost surely, 2^{20112120021020} is an apocalyptic number.

20112120021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112120021020 is an abundant number, since it is smaller than the sum of its proper divisors (22126343194180).

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

20112120021020 is a wasteful number, since it uses less digits than its factorization.

20112120021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71694557 (or 71694555 counting only the distinct ones).

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

Adding to 20112120021020 its reverse (2012002121102), we get a palindrome (22124122142122).

The spelling of 20112120021020 in words is "twenty trillion, one hundred twelve billion, one hundred twenty million, twenty-one thousand, twenty".