1377031864121 has 2 divisors, whose sum is σ = 1377031864122. Its totient is φ = 1377031864120.

The previous prime is 1377031864081. The next prime is 1377031864181. The reversal of 1377031864121 is 1214681307731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1306734765625 + 70297098496 = 1143125^2 + 265136^2 .

It is an emirp because it is prime and its reverse (1214681307731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377031864121 - 2⁶ = 1377031864057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1377031864181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688515932060 + 688515932061.

It is an arithmetic number, because the mean of its divisors is an integer number (688515932061).

Almost surely, 2^{1377031864121} is an apocalyptic number.

It is an amenable number.

1377031864121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377031864121 is an equidigital number, since it uses as much as digits as its factorization.

1377031864121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 1377031864121 in words is "one trillion, three hundred seventy-seven billion, thirty-one million, eight hundred sixty-four thousand, one hundred twenty-one".