1206774853421 has 4 divisors (see below), whose sum is σ = 1229544190332. Its totient is φ = 1184005516512.

The previous prime is 1206774853397. The next prime is 1206774853457. The reversal of 1206774853421 is 1243584776021.

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 289997328196 + 916777525225 = 538514^2 + 957485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206774853421 - 2¹⁸ = 1206774591277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206774853421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206774853481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11384668376 + ... + 11384668481.

It is an arithmetic number, because the mean of its divisors is an integer number (307386047583).

Almost surely, 2^{1206774853421} is an apocalyptic number.

It is an amenable number.

1206774853421 is a deficient number, since it is larger than the sum of its proper divisors (22769336911).

1206774853421 is an equidigital number, since it uses as much as digits as its factorization.

1206774853421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22769336910.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 1206774853421 in words is "one trillion, two hundred six billion, seven hundred seventy-four million, eight hundred fifty-three thousand, four hundred twenty-one".