1275036221671 has 16 divisors (see below), whose sum is σ = 1309184704800. Its totient is φ = 1241036121600.

The previous prime is 1275036221663. The next prime is 1275036221681. The reversal of 1275036221671 is 1761226305721.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1275036221671 - 2³ = 1275036221663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275036221681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34101475 + ... + 34138843.

It is an arithmetic number, because the mean of its divisors is an integer number (81824044050).

Almost surely, 2^{1275036221671} is an apocalyptic number.

1275036221671 is a deficient number, since it is larger than the sum of its proper divisors (34148483129).

1275036221671 is a wasteful number, since it uses less digits than its factorization.

1275036221671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39330.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 1275036221671 in words is "one trillion, two hundred seventy-five billion, thirty-six million, two hundred twenty-one thousand, six hundred seventy-one".