13421021405573 has 2 divisors, whose sum is σ = 13421021405574. Its totient is φ = 13421021405572.

The previous prime is 13421021405503. The next prime is 13421021405593. The reversal of 13421021405573 is 37550412012431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12849306975649 + 571714429924 = 3584593^2 + 756118^2 .

It is a cyclic number.

It is not a de Polignac number, because 13421021405573 - 2¹⁴ = 13421021389189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13421021405503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6710510702786 + 6710510702787.

It is an arithmetic number, because the mean of its divisors is an integer number (6710510702787).

Almost surely, 2^{13421021405573} is an apocalyptic number.

It is an amenable number.

13421021405573 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421021405573 is an equidigital number, since it uses as much as digits as its factorization.

13421021405573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 13421021405573 in words is "thirteen trillion, four hundred twenty-one billion, twenty-one million, four hundred five thousand, five hundred seventy-three".