20111211201 has 16 divisors (see below), whose sum is σ = 27994576896. Its totient is φ = 12818233296.

The previous prime is 20111211199. The next prime is 20111211313. The reversal of 20111211201 is 10211211102.

It is not a de Polignac number, because 20111211201 - 2¹ = 20111211199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20111211101) 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, 71706 + ... + 212988.

It is an arithmetic number, because the mean of its divisors is an integer number (1749661056).

Almost surely, 2^20111211201 is an apocalyptic number.

It is an amenable number.

20111211201 is a deficient number, since it is larger than the sum of its proper divisors (7883365695).

20111211201 is a wasteful number, since it uses less digits than its factorization.

20111211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143372.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111211201 its reverse (10211211102), we get a palindrome (30322422303).

Subtracting from 20111211201 its reverse (10211211102), we obtain a palindrome (9900000099).

The spelling of 20111211201 in words is "twenty billion, one hundred eleven million, two hundred eleven thousand, two hundred one".