1200232131121 has 4 divisors (see below), whose sum is σ = 1200238451572. Its totient is φ = 1200225810672.

The previous prime is 1200232131103. The next prime is 1200232131181. The reversal of 1200232131121 is 1211312320021.

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 568612516096 + 631619615025 = 754064^2 + 794745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200232131121 - 2²¹ = 1200230033969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200232131181) 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, 2866266 + ... + 3258211.

It is an arithmetic number, because the mean of its divisors is an integer number (300059612893).

Almost surely, 2^{1200232131121} is an apocalyptic number.

It is an amenable number.

1200232131121 is a deficient number, since it is larger than the sum of its proper divisors (6320451).

1200232131121 is an equidigital number, since it uses as much as digits as its factorization.

1200232131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6320450.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1200232131121 its reverse (1211312320021), we get a palindrome (2411544451142).

The spelling of 1200232131121 in words is "one trillion, two hundred billion, two hundred thirty-two million, one hundred thirty-one thousand, one hundred twenty-one".