2120426231465 has 4 divisors (see below), whose sum is σ = 2544511477764. Its totient is φ = 1696340985168.

The previous prime is 2120426231449. The next prime is 2120426231501. The reversal of 2120426231465 is 5641326240212.

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 1382084735641 + 738341495824 = 1175621^2 + 859268^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120426231465 - 2⁴ = 2120426231449 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, 212042623142 + ... + 212042623151.

It is an arithmetic number, because the mean of its divisors is an integer number (636127869441).

Almost surely, 2^{2120426231465} is an apocalyptic number.

It is an amenable number.

2120426231465 is a deficient number, since it is larger than the sum of its proper divisors (424085246299).

2120426231465 is an equidigital number, since it uses as much as digits as its factorization.

2120426231465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424085246298.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 2120426231465 in words is "two trillion, one hundred twenty billion, four hundred twenty-six million, two hundred thirty-one thousand, four hundred sixty-five".