20120000100120 has 48 divisors (see below), whose sum is σ = 65390000326560. Its totient is φ = 5365333359936.

The previous prime is 20120000100089. The next prime is 20120000100121. The reversal of 20120000100120 is 2100100002102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120000100121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27944444224 + ... + 27944444943.

It is an arithmetic number, because the mean of its divisors is an integer number (1362291673470).

Almost surely, 2^{20120000100120} is an apocalyptic number.

20120000100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120000100120 is an abundant number, since it is smaller than the sum of its proper divisors (45270000226440).

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

20120000100120 is a wasteful number, since it uses less digits than its factorization.

20120000100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55888889184 (or 55888889177 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20120000100120 its reverse (2100100002102), we get a palindrome (22220100102222).

The spelling of 20120000100120 in words is "twenty trillion, one hundred twenty billion, one hundred thousand, one hundred twenty".