1111212200121 has 8 divisors (see below), whose sum is σ = 1481932127904. Its totient is φ = 740650202880.

The previous prime is 1111212200107. The next prime is 1111212200167. The reversal of 1111212200121 is 1210022121111.

It is a happy number.

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

It is not a de Polignac number, because 1111212200121 - 2⁶ = 1111212200057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111212200121.

It is not an unprimeable number, because it can be changed into a prime (1111212200621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39466216 + ... + 39494361.

It is an arithmetic number, because the mean of its divisors is an integer number (185241515988).

Almost surely, 2^{1111212200121} is an apocalyptic number.

It is an amenable number.

1111212200121 is a deficient number, since it is larger than the sum of its proper divisors (370719927783).

1111212200121 is an equidigital number, since it uses as much as digits as its factorization.

1111212200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78965271.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111212200121 its reverse (1210022121111), we get a palindrome (2321234321232).

The spelling of 1111212200121 in words is "one trillion, one hundred eleven billion, two hundred twelve million, two hundred thousand, one hundred twenty-one".