20121111101201 has 16 divisors (see below), whose sum is σ = 22481028947520. Its totient is φ = 17850414765120.

The previous prime is 20121111101183. The next prime is 20121111101263. The reversal of 20121111101201 is 10210111112102.

It is a cyclic number.

It is not a de Polignac number, because 20121111101201 - 2⁶ = 20121111101137 is a prime.

It is a super-2 number, since 2×20121111101201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121111101401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18654590 + ... + 19703703.

It is an arithmetic number, because the mean of its divisors is an integer number (1405064309220).

Almost surely, 2^{20121111101201} is an apocalyptic number.

It is an amenable number.

20121111101201 is a deficient number, since it is larger than the sum of its proper divisors (2359917846319).

20121111101201 is a wasteful number, since it uses less digits than its factorization.

20121111101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38359456.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20121111101201 its reverse (10210111112102), we get a palindrome (30331222213303).

The spelling of 20121111101201 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred one thousand, two hundred one".