20121120120204 has 36 divisors (see below), whose sum is σ = 53538652953240. Its totient is φ = 6354037932480.

The previous prime is 20121120120203. The next prime is 20121120120301. The reversal of 20121120120204 is 40202102112102.

20121120120204 is a `hidden beast` number, since 201 + 21 + 120 + 120 + 204 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20121120120203) 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, 14708420457 + ... + 14708421824.

Almost surely, 2^{20121120120204} is an apocalyptic number.

It is an amenable number.

20121120120204 is an abundant number, since it is smaller than the sum of its proper divisors (33417532833036).

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

20121120120204 is a wasteful number, since it uses less digits than its factorization.

20121120120204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29416842310 (or 29416842305 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20121120120204 its reverse (40202102112102), we get a palindrome (60323222232306).

The spelling of 20121120120204 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, two hundred four".