201121220011 has 16 divisors (see below), whose sum is σ = 212630019840. Its totient is φ = 189705348000.

The previous prime is 201121219979. The next prime is 201121220039. The reversal of 201121220011 is 110022121102.

It is not a de Polignac number, because 201121220011 - 2⁵ = 201121219979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201121219973 and 201121220000.

It is not an unprimeable number, because it can be changed into a prime (201121224011) 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, 16079586 + ... + 16092088.

It is an arithmetic number, because the mean of its divisors is an integer number (13289376240).

Almost surely, 2^201121220011 is an apocalyptic number.

201121220011 is a deficient number, since it is larger than the sum of its proper divisors (11508799829).

201121220011 is a wasteful number, since it uses less digits than its factorization.

201121220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16146.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201121220011 its reverse (110022121102), we get a palindrome (311143341113).

The spelling of 201121220011 in words is "two hundred one billion, one hundred twenty-one million, two hundred twenty thousand, eleven".