1275988632221 has 2 divisors, whose sum is σ = 1275988632222. Its totient is φ = 1275988632220.

The previous prime is 1275988632209. The next prime is 1275988632301. The reversal of 1275988632221 is 1222368895721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1267844472196 + 8144160025 = 1125986^2 + 90245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275988632221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1275985632221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637994316110 + 637994316111.

It is an arithmetic number, because the mean of its divisors is an integer number (637994316111).

Almost surely, 2^{1275988632221} is an apocalyptic number.

It is an amenable number.

1275988632221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275988632221 is an equidigital number, since it uses as much as digits as its factorization.

1275988632221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 56.

The spelling of 1275988632221 in words is "one trillion, two hundred seventy-five billion, nine hundred eighty-eight million, six hundred thirty-two thousand, two hundred twenty-one".