201222011121 has 8 divisors (see below), whose sum is σ = 275547258624. Its totient is φ = 130522385520.

The previous prime is 201222011077. The next prime is 201222011129. The reversal of 201222011121 is 121110222102.

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

It is not a de Polignac number, because 201222011121 - 2¹⁷ = 201221880049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201222011121.

It is not an unprimeable number, because it can be changed into a prime (201222011129) 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, 906405345 + ... + 906405566.

It is an arithmetic number, because the mean of its divisors is an integer number (34443407328).

Almost surely, 2^201222011121 is an apocalyptic number.

It is an amenable number.

201222011121 is a deficient number, since it is larger than the sum of its proper divisors (74325247503).

201222011121 is a wasteful number, since it uses less digits than its factorization.

201222011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812810951.

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

Adding to 201222011121 its reverse (121110222102), we get a palindrome (322332233223).

The spelling of 201222011121 in words is "two hundred one billion, two hundred twenty-two million, eleven thousand, one hundred twenty-one".