20112001221201 has 16 divisors (see below), whose sum is σ = 27543644635584. Its totient is φ = 13044255263424.

The previous prime is 20112001221199. The next prime is 20112001221209. The reversal of 20112001221201 is 10212210021102.

It is not a de Polignac number, because 20112001221201 - 2¹ = 20112001221199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112001221209) 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, 8429610 + ... + 10549043.

It is an arithmetic number, because the mean of its divisors is an integer number (1721477789724).

Almost surely, 2^{20112001221201} is an apocalyptic number.

It is an amenable number.

20112001221201 is a deficient number, since it is larger than the sum of its proper divisors (7431643414383).

20112001221201 is a wasteful number, since it uses less digits than its factorization.

20112001221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18988240.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20112001221201 its reverse (10212210021102), we get a palindrome (30324211242303).

The spelling of 20112001221201 in words is "twenty trillion, one hundred twelve billion, one million, two hundred twenty-one thousand, two hundred one".