1125510022121 has 4 divisors (see below), whose sum is σ = 1126562885700. Its totient is φ = 1124457158544.

The previous prime is 1125510022081. The next prime is 1125510022123. The reversal of 1125510022121 is 1212200155211.

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 476188324096 + 649321698025 = 690064^2 + 805805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125510022121 - 2⁶ = 1125510022057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125510022123) 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, 526430186 + ... + 526432323.

It is an arithmetic number, because the mean of its divisors is an integer number (281640721425).

Almost surely, 2^{1125510022121} is an apocalyptic number.

It is an amenable number.

1125510022121 is a deficient number, since it is larger than the sum of its proper divisors (1052863579).

1125510022121 is a wasteful number, since it uses less digits than its factorization.

1125510022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052863578.

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 1125510022121 its reverse (1212200155211), we get a palindrome (2337710177332).

The spelling of 1125510022121 in words is "one trillion, one hundred twenty-five billion, five hundred ten million, twenty-two thousand, one hundred twenty-one".