20111111001201 has 128 divisors (see below), whose sum is σ = 33118697779200. Its totient is φ = 10707615452160.

The previous prime is 20111111001139. The next prime is 20111111001227. The reversal of 20111111001201 is 10210011111102.

It is not a de Polignac number, because 20111111001201 - 2¹³ = 20111110993009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20111111001251) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 147732795 + ... + 147868863.

It is an arithmetic number, because the mean of its divisors is an integer number (258739826400).

Almost surely, 2^{20111111001201} is an apocalyptic number.

It is an amenable number.

20111111001201 is a deficient number, since it is larger than the sum of its proper divisors (13007586777999).

20111111001201 is a wasteful number, since it uses less digits than its factorization.

20111111001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136439.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 20111111001201 its reverse (10210011111102), we get a palindrome (30321122112303).

The spelling of 20111111001201 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, one thousand, two hundred one".