20111220201202 has 16 divisors (see below), whose sum is σ = 32724489698712. Its totient is φ = 9214349063040.

The previous prime is 20111220201169. The next prime is 20111220201229. The reversal of 20111220201202 is 20210202211102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15319153332961 + 4792066868241 = 3913969^2 + 2189079^2 .

It is a super-2 number, since 2×20111220201202² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2823020049 + ... + 2823027172.

Almost surely, 2^{20111220201202} is an apocalyptic number.

20111220201202 is a deficient number, since it is larger than the sum of its proper divisors (12613269497510).

20111220201202 is a wasteful number, since it uses less digits than its factorization.

20111220201202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5646047373.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20111220201202 its reverse (20210202211102), we get a palindrome (40321422412304).

The spelling of 20111220201202 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, two hundred one thousand, two hundred two".