1206984057121 has 4 divisors (see below), whose sum is σ = 1239605247892. Its totient is φ = 1174362866352.

The previous prime is 1206984057119. The next prime is 1206984057137. The reversal of 1206984057121 is 1217504896021.

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 1135194357025 + 71789700096 = 1065455^2 + 267936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206984057121 - 2¹ = 1206984057119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1206984057101) 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, 16310595330 + ... + 16310595403.

It is an arithmetic number, because the mean of its divisors is an integer number (309901311973).

Almost surely, 2^{1206984057121} is an apocalyptic number.

It is an amenable number.

1206984057121 is a deficient number, since it is larger than the sum of its proper divisors (32621190771).

1206984057121 is an equidigital number, since it uses as much as digits as its factorization.

1206984057121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32621190770.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 1206984057121 in words is "one trillion, two hundred six billion, nine hundred eighty-four million, fifty-seven thousand, one hundred twenty-one".