20112001021020 has 24 divisors (see below), whose sum is σ = 56313602859024. Its totient is φ = 5363200272256.

The previous prime is 20112001021019. The next prime is 20112001021033. The reversal of 20112001021020 is 2012010021102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20112001020987 and 20112001021005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167600008449 + ... + 167600008568.

It is an arithmetic number, because the mean of its divisors is an integer number (2346400119126).

Almost surely, 2^{20112001021020} is an apocalyptic number.

20112001021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112001021020 is an abundant number, since it is smaller than the sum of its proper divisors (36201601838004).

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

20112001021020 is a wasteful number, since it uses less digits than its factorization.

20112001021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335200017029 (or 335200017027 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20112001021020 its reverse (2012010021102), we get a palindrome (22124011042122).

The spelling of 20112001021020 in words is "twenty trillion, one hundred twelve billion, one million, twenty-one thousand, twenty".