1211133222121 has 8 divisors (see below), whose sum is σ = 1286939974824. Its totient is φ = 1135833538560.

The previous prime is 1211133222113. The next prime is 1211133222133. The reversal of 1211133222121 is 1212223311121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 202554903721 + 1008578318400 = 450061^2 + 1004280^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1211133222121 - 2³ = 1211133222113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211133222092 and 1211133222101.

It is not an unprimeable number, because it can be changed into a prime (1211133222721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126762360 + ... + 126771913.

It is an arithmetic number, because the mean of its divisors is an integer number (160867496853).

Almost surely, 2^{1211133222121} is an apocalyptic number.

It is an amenable number.

1211133222121 is a deficient number, since it is larger than the sum of its proper divisors (75806752703).

1211133222121 is a wasteful number, since it uses less digits than its factorization.

1211133222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253534571.

The product of its digits is 288, while the sum is 22.

Adding to 1211133222121 its reverse (1212223311121), we get a palindrome (2423356533242).

The spelling of 1211133222121 in words is "one trillion, two hundred eleven billion, one hundred thirty-three million, two hundred twenty-two thousand, one hundred twenty-one".