21124350162613 has 4 divisors (see below), whose sum is σ = 21573804421440. Its totient is φ = 20674895903788.

The previous prime is 21124350162607. The next prime is 21124350162673. The reversal of 21124350162613 is 31626105342112.

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 21124350162613 - 2³³ = 21115760228021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124350162673) 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, 224727129343 + ... + 224727129436.

It is an arithmetic number, because the mean of its divisors is an integer number (5393451105360).

Almost surely, 2^{21124350162613} is an apocalyptic number.

It is an amenable number.

21124350162613 is a deficient number, since it is larger than the sum of its proper divisors (449454258827).

21124350162613 is an equidigital number, since it uses as much as digits as its factorization.

21124350162613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449454258826.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 21124350162613 in words is "twenty-one trillion, one hundred twenty-four billion, three hundred fifty million, one hundred sixty-two thousand, six hundred thirteen".