2144515266421 has 4 divisors (see below), whose sum is σ = 2339471199744. Its totient is φ = 1949559333100.

The previous prime is 2144515266373. The next prime is 2144515266449. The reversal of 2144515266421 is 1246625154412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2144515266421 - 2⁹ = 2144515265909 is a prime.

It is a super-2 number, since 2×2144515266421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144515266461) 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 in 3 ways as a sum of consecutive naturals, for example, 97477966645 + ... + 97477966666.

It is an arithmetic number, because the mean of its divisors is an integer number (584867799936).

Almost surely, 2^{2144515266421} is an apocalyptic number.

It is an amenable number.

2144515266421 is a deficient number, since it is larger than the sum of its proper divisors (194955933323).

2144515266421 is a wasteful number, since it uses less digits than its factorization.

2144515266421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194955933322.

The product of its digits is 460800, while the sum is 43.

The spelling of 2144515266421 in words is "two trillion, one hundred forty-four billion, five hundred fifteen million, two hundred sixty-six thousand, four hundred twenty-one".