4254321011521 has 4 divisors (see below), whose sum is σ = 4862081156032. Its totient is φ = 3646560867012.

The previous prime is 4254321011467. The next prime is 4254321011561. The reversal of 4254321011521 is 1251101234524.

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 not a de Polignac number, because 4254321011521 - 2⁷ = 4254321011393 is a prime.

It is a super-2 number, since 2×4254321011521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4254321011561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303880072245 + ... + 303880072258.

It is an arithmetic number, because the mean of its divisors is an integer number (1215520289008).

Almost surely, 2^{4254321011521} is an apocalyptic number.

It is an amenable number.

4254321011521 is a deficient number, since it is larger than the sum of its proper divisors (607760144511).

4254321011521 is an equidigital number, since it uses as much as digits as its factorization.

4254321011521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607760144510.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 4254321011521 in words is "four trillion, two hundred fifty-four billion, three hundred twenty-one million, eleven thousand, five hundred twenty-one".