20122112111201 has 4 divisors (see below), whose sum is σ = 20815978046100. Its totient is φ = 19428246176304.

The previous prime is 20122112111161. The next prime is 20122112111203. The reversal of 20122112111201 is 10211121122102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12619552864801 + 7502559246400 = 3552401^2 + 2739080^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122112111201 - 2¹⁸ = 20122111849057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122112111201.

It is not an unprimeable number, because it can be changed into a prime (20122112111203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346932967406 + ... + 346932967463.

It is an arithmetic number, because the mean of its divisors is an integer number (5203994511525).

Almost surely, 2^{20122112111201} is an apocalyptic number.

It is an amenable number.

20122112111201 is a deficient number, since it is larger than the sum of its proper divisors (693865934899).

20122112111201 is an equidigital number, since it uses as much as digits as its factorization.

20122112111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693865934898.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20122112111201 its reverse (10211121122102), we get a palindrome (30333233233303).

The spelling of 20122112111201 in words is "twenty trillion, one hundred twenty-two billion, one hundred twelve million, one hundred eleven thousand, two hundred one".