1121200111121 has 4 divisors (see below), whose sum is σ = 1187153058852. Its totient is φ = 1055247163392.

The previous prime is 1121200111103. The next prime is 1121200111133. The reversal of 1121200111121 is 1211110021211.

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 850268410000 + 270931701121 = 922100^2 + 520511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121200111121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121200111096 and 1121200111105.

It is not an unprimeable number, because it can be changed into a prime (1121200111621) 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, 32976473840 + ... + 32976473873.

It is an arithmetic number, because the mean of its divisors is an integer number (296788264713).

Almost surely, 2^{1121200111121} is an apocalyptic number.

It is an amenable number.

1121200111121 is a deficient number, since it is larger than the sum of its proper divisors (65952947731).

1121200111121 is an equidigital number, since it uses as much as digits as its factorization.

1121200111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65952947730.

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

Adding to 1121200111121 its reverse (1211110021211), we get a palindrome (2332310132332).

It can be divided in two parts, 1121200 and 111121, that added together give a palindrome (1232321).

The spelling of 1121200111121 in words is "one trillion, one hundred twenty-one billion, two hundred million, one hundred eleven thousand, one hundred twenty-one".