20101220111120 has 40 divisors (see below), whose sum is σ = 46736008108800. Its totient is φ = 8040372543360.

The previous prime is 20101220111087. The next prime is 20101220111221. The reversal of 20101220111120 is 2111102210102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 20101220111095 and 20101220111104.

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, 3911681 + ... + 7450079.

It is an arithmetic number, because the mean of its divisors is an integer number (1168400202720).

Almost surely, 2^{20101220111120} is an apocalyptic number.

20101220111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101220111120 is an abundant number, since it is smaller than the sum of its proper divisors (26634787997680).

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

20101220111120 is a wasteful number, since it uses less digits than its factorization.

20101220111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609423 (or 3609417 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20101220111120 its reverse (2111102210102), we get a palindrome (22212322321222).

The spelling of 20101220111120 in words is "twenty trillion, one hundred one billion, two hundred twenty million, one hundred eleven thousand, one hundred twenty".