201121222011 has 32 divisors (see below), whose sum is σ = 287883729408. Its totient is φ = 124567787520.

The previous prime is 201121222007. The next prime is 201121222069. The reversal of 201121222011 is 110222121102.

It is not a de Polignac number, because 201121222011 - 2² = 201121222007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201121222111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1404816 + ... + 1541346.

It is an arithmetic number, because the mean of its divisors is an integer number (8996366544).

Almost surely, 2^201121222011 is an apocalyptic number.

201121222011 is a deficient number, since it is larger than the sum of its proper divisors (86762507397).

201121222011 is a wasteful number, since it uses less digits than its factorization.

201121222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137171.

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

Adding to 201121222011 its reverse (110222121102), we get a palindrome (311343343113).

The spelling of 201121222011 in words is "two hundred one billion, one hundred twenty-one million, two hundred twenty-two thousand, eleven".