201121011111222 has 48 divisors (see below), whose sum is σ = 447972791323200. Its totient is φ = 65165291150976.

The previous prime is 201121011111221. The next prime is 201121011111239. The reversal of 201121011111222 is 222111110121102.

It is a happy number.

201121011111222 is a `hidden beast` number, since 201 + 121 + 0 + 11 + 111 + 222 = 666.

It is a super-2 number, since 2×201121011111222² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201121011111195 and 201121011111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121011111221) 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, 145480222 + ... + 146856177.

It is an arithmetic number, because the mean of its divisors is an integer number (9332766485900).

Almost surely, 2^{201121011111222} is an apocalyptic number.

201121011111222 is an abundant number, since it is smaller than the sum of its proper divisors (246851780211978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201121011111222 is a wasteful number, since it uses less digits than its factorization.

201121011111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292337477 (or 292337474 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 201121011111222 its reverse (222111110121102), we get a palindrome (423232121232324).

The spelling of 201121011111222 in words is "two hundred one trillion, one hundred twenty-one billion, eleven million, one hundred eleven thousand, two hundred twenty-two".