201222311121 has 24 divisors (see below), whose sum is σ = 315782526696. Its totient is φ = 122733273600.

The previous prime is 201222311111. The next prime is 201222311123. The reversal of 201222311121 is 121113222102.

It can be written as a sum of positive squares in 4 ways, for example, as 13962730896 + 187259580225 = 118164^2 + 432735^2 .

It is not a de Polignac number, because 201222311121 - 2⁵ = 201222311089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201222311094 and 201222311103.

It is not an unprimeable number, because it can be changed into a prime (201222311123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7596730 + ... + 7623171.

It is an arithmetic number, because the mean of its divisors is an integer number (13157605279).

Almost surely, 2^201222311121 is an apocalyptic number.

It is an amenable number.

201222311121 is a deficient number, since it is larger than the sum of its proper divisors (114560215575).

201222311121 is a wasteful number, since it uses less digits than its factorization.

201222311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15220033 (or 15220030 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 201222311121 its reverse (121113222102), we get a palindrome (322335533223).

The spelling of 201222311121 in words is "two hundred one billion, two hundred twenty-two million, three hundred eleven thousand, one hundred twenty-one".