1200105254321 has 2 divisors, whose sum is σ = 1200105254322. Its totient is φ = 1200105254320.

The previous prime is 1200105254263. The next prime is 1200105254339. The reversal of 1200105254321 is 1234525010021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 939418423696 + 260686830625 = 969236^2 + 510575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200105254321 - 2³⁴ = 1182925385137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200105254371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600052627160 + 600052627161.

It is an arithmetic number, because the mean of its divisors is an integer number (600052627161).

Almost surely, 2^{1200105254321} is an apocalyptic number.

It is an amenable number.

1200105254321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200105254321 is an equidigital number, since it uses as much as digits as its factorization.

1200105254321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 1200105254321 in words is "one trillion, two hundred billion, one hundred five million, two hundred fifty-four thousand, three hundred twenty-one".