20011020122120 has 16 divisors (see below), whose sum is σ = 45024795274860. Its totient is φ = 8004408048832.

The previous prime is 20011020122063. The next prime is 20011020122131. The reversal of 20011020122120 is 2122102011002.

It can be written as a sum of positive squares in 2 ways, for example, as 19781021227396 + 229998894724 = 4447586^2 + 479582^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20011020122095 and 20011020122104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250137751487 + ... + 250137751566.

Almost surely, 2^{20011020122120} is an apocalyptic number.

20011020122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011020122120 is an abundant number, since it is smaller than the sum of its proper divisors (25013775152740).

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

20011020122120 is a wasteful number, since it uses less digits than its factorization.

20011020122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500275503064 (or 500275503060 counting only the distinct ones).

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

Adding to 20011020122120 its reverse (2122102011002), we get a palindrome (22133122133122).

The spelling of 20011020122120 in words is "twenty trillion, eleven billion, twenty million, one hundred twenty-two thousand, one hundred twenty".