1111112020121 has 4 divisors (see below), whose sum is σ = 1111797470244. Its totient is φ = 1110426570000.

The previous prime is 1111112020069. The next prime is 1111112020127. The reversal of 1111112020121 is 1210202111111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 793088208025 + 318023812096 = 890555^2 + 563936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111112020121 - 2³⁸ = 836234113177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111112020096 and 1111112020105.

It is not an unprimeable number, because it can be changed into a prime (1111112020127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342722630 + ... + 342725871.

It is an arithmetic number, because the mean of its divisors is an integer number (277949367561).

Almost surely, 2^{1111112020121} is an apocalyptic number.

It is an amenable number.

1111112020121 is a deficient number, since it is larger than the sum of its proper divisors (685450123).

1111112020121 is an equidigital number, since it uses as much as digits as its factorization.

1111112020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685450122.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1111112020121 its reverse (1210202111111), we get a palindrome (2321314131232).

The spelling of 1111112020121 in words is "one trillion, one hundred eleven billion, one hundred twelve million, twenty thousand, one hundred twenty-one".