1112121220121 has 8 divisors (see below), whose sum is σ = 1175163866880. Its totient is φ = 1050302702592.

The previous prime is 1112121220019. The next prime is 1112121220159. The reversal of 1112121220121 is 1210221212111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112121220121 is a prime.

It is a super-4 number, since 4×1112121220121⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1112121220121.

It is not an unprimeable number, because it can be changed into a prime (1112121220421) 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, 306030440 + ... + 306034073.

It is an arithmetic number, because the mean of its divisors is an integer number (146895483360).

Almost surely, 2^{1112121220121} is an apocalyptic number.

It is an amenable number.

1112121220121 is a deficient number, since it is larger than the sum of its proper divisors (63042646759).

1112121220121 is an equidigital number, since it uses as much as digits as its factorization.

1112121220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612064615.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1112121220121 its reverse (1210221212111), we get a palindrome (2322342432232).

The spelling of 1112121220121 in words is "one trillion, one hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-one".