20011001000120 has 64 divisors (see below), whose sum is σ = 48488738084640. Its totient is φ = 7388594496000.

The previous prime is 20011001000119. The next prime is 20011001000141. The reversal of 20011001000120 is 2100010011002.

It is a super-2 number, since 2×20011001000120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 20011001000098 and 20011001000107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65435570 + ... + 65740670.

Almost surely, 2^{20011001000120} is an apocalyptic number.

20011001000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011001000120 is an abundant number, since it is smaller than the sum of its proper divisors (28477737084520).

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

20011001000120 is a wasteful number, since it uses less digits than its factorization.

20011001000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431256 (or 431252 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20011001000120 its reverse (2100010011002), we get a palindrome (22111011011122).

The spelling of 20011001000120 in words is "twenty trillion, eleven billion, one million, one hundred twenty", and thus it is an aban number.