201111220121 has 8 divisors (see below), whose sum is σ = 241938310080. Its totient is φ = 163308359088.

The previous prime is 201111219983. The next prime is 201111220129. The reversal of 201111220121 is 121022111102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-201111220121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201111220096 and 201111220105.

It is not an unprimeable number, because it can be changed into a prime (201111220129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756057086 + ... + 756057351.

It is an arithmetic number, because the mean of its divisors is an integer number (30242288760).

Almost surely, 2^201111220121 is an apocalyptic number.

It is an amenable number.

201111220121 is a deficient number, since it is larger than the sum of its proper divisors (40827089959).

201111220121 is a wasteful number, since it uses less digits than its factorization.

201111220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512114463.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201111220121 its reverse (121022111102), we get a palindrome (322133331223).

The spelling of 201111220121 in words is "two hundred one billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-one".