1356315928421 has 2 divisors, whose sum is σ = 1356315928422. Its totient is φ = 1356315928420.

The previous prime is 1356315928393. The next prime is 1356315928433. The reversal of 1356315928421 is 1248295136531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1303054212196 + 53261716225 = 1141514^2 + 230785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356315928421 - 2¹⁴ = 1356315912037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1356315928421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356315928021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678157964210 + 678157964211.

It is an arithmetic number, because the mean of its divisors is an integer number (678157964211).

Almost surely, 2^{1356315928421} is an apocalyptic number.

It is an amenable number.

1356315928421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356315928421 is an equidigital number, since it uses as much as digits as its factorization.

1356315928421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 50.

The spelling of 1356315928421 in words is "one trillion, three hundred fifty-six billion, three hundred fifteen million, nine hundred twenty-eight thousand, four hundred twenty-one".