1345436221123 has 2 divisors, whose sum is σ = 1345436221124. Its totient is φ = 1345436221122.

The previous prime is 1345436221037. The next prime is 1345436221139. The reversal of 1345436221123 is 3211226345431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345436221123 is a prime.

It is a super-2 number, since 2×1345436221123² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1345436221163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672718110561 + 672718110562.

It is an arithmetic number, because the mean of its divisors is an integer number (672718110562).

Almost surely, 2^{1345436221123} is an apocalyptic number.

1345436221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345436221123 is an equidigital number, since it uses as much as digits as its factorization.

1345436221123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 37.

The spelling of 1345436221123 in words is "one trillion, three hundred forty-five billion, four hundred thirty-six million, two hundred twenty-one thousand, one hundred twenty-three".