1345005315221 has 2 divisors, whose sum is σ = 1345005315222. Its totient is φ = 1345005315220.

The previous prime is 1345005315197. The next prime is 1345005315239. The reversal of 1345005315221 is 1225135005431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254019228900 + 90986086321 = 1119830^2 + 301639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345005315221 - 2¹⁴ = 1345005298837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345005315271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672502657610 + 672502657611.

It is an arithmetic number, because the mean of its divisors is an integer number (672502657611).

Almost surely, 2^{1345005315221} is an apocalyptic number.

It is an amenable number.

1345005315221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345005315221 is an equidigital number, since it uses as much as digits as its factorization.

1345005315221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 1345005315221 in words is "one trillion, three hundred forty-five billion, five million, three hundred fifteen thousand, two hundred twenty-one".