1423220221505 has 4 divisors (see below), whose sum is σ = 1707864265812. Its totient is φ = 1138576177200.

The previous prime is 1423220221487. The next prime is 1423220221513. The reversal of 1423220221505 is 5051220223241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 937744330384 + 485475891121 = 968372^2 + 696761^2 .

It is not a de Polignac number, because 1423220221505 - 2¹⁶ = 1423220155969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142322022146 + ... + 142322022155.

It is an arithmetic number, because the mean of its divisors is an integer number (426966066453).

Almost surely, 2^{1423220221505} is an apocalyptic number.

It is an amenable number.

1423220221505 is a deficient number, since it is larger than the sum of its proper divisors (284644044307).

1423220221505 is an equidigital number, since it uses as much as digits as its factorization.

1423220221505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284644044306.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 1423220221505 its reverse (5051220223241), we get a palindrome (6474440444746).

The spelling of 1423220221505 in words is "one trillion, four hundred twenty-three billion, two hundred twenty million, two hundred twenty-one thousand, five hundred five".