20011112202120 has 128 divisors (see below), whose sum is σ = 64797227510400. Its totient is φ = 4914692849664.

The previous prime is 20011112202097. The next prime is 20011112202187. The reversal of 20011112202120 is 2120221111002.

It is a super-2 number, since 2×20011112202120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20011112202120.

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, 13787065 + ... + 15169224.

It is an arithmetic number, because the mean of its divisors is an integer number (506228339925).

Almost surely, 2^{20011112202120} is an apocalyptic number.

20011112202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011112202120 is an abundant number, since it is smaller than the sum of its proper divisors (44786115308280).

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

20011112202120 is a wasteful number, since it uses less digits than its factorization.

20011112202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28956759 (or 28956755 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20011112202120 its reverse (2120221111002), we get a palindrome (22131333313122).

The spelling of 20011112202120 in words is "twenty trillion, eleven billion, one hundred twelve million, two hundred two thousand, one hundred twenty".