20120112200091 has 64 divisors (see below), whose sum is σ = 28999395532800. Its totient is φ = 12369951495936.

The previous prime is 20120112199997. The next prime is 20120112200117. The reversal of 20120112200091 is 19000221102102.

It is not a de Polignac number, because 20120112200091 - 2¹⁴ = 20120112183707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20120112200491) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 147638215 + ... + 147774431.

It is an arithmetic number, because the mean of its divisors is an integer number (453115555200).

Almost surely, 2^{20120112200091} is an apocalyptic number.

20120112200091 is a deficient number, since it is larger than the sum of its proper divisors (8879283332709).

20120112200091 is a wasteful number, since it uses less digits than its factorization.

20120112200091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136728.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 20120112200091 its reverse (19000221102102), we get a palindrome (39120333302193).

The spelling of 20120112200091 in words is "twenty trillion, one hundred twenty billion, one hundred twelve million, two hundred thousand, ninety-one".