20121201302320 has 40 divisors (see below), whose sum is σ = 46782020598336. Its totient is φ = 8048441369088.

The previous prime is 20121201302303. The next prime is 20121201302327. The reversal of 20121201302320 is 2320310212102.

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

It is not an unprimeable number, because it can be changed into a prime (20121201302327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20433609 + ... + 21395671.

Almost surely, 2^{20121201302320} is an apocalyptic number.

20121201302320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121201302320 is an abundant number, since it is smaller than the sum of its proper divisors (26660819296016).

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

20121201302320 is a wasteful number, since it uses less digits than its factorization.

20121201302320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223509 (or 1223503 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20121201302320 its reverse (2320310212102), we get a palindrome (22441511514422).

The spelling of 20121201302320 in words is "twenty trillion, one hundred twenty-one billion, two hundred one million, three hundred two thousand, three hundred twenty".