16521245101 has 4 divisors (see below), whose sum is σ = 16558539552. Its totient is φ = 16483950652.

The previous prime is 16521245093. The next prime is 16521245107. The reversal of 16521245101 is 10154212561.

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 16521245101 - 2³ = 16521245093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16521245101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521245107) 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, 18646561 + ... + 18647446.

It is an arithmetic number, because the mean of its divisors is an integer number (4139634888).

Almost surely, 2^16521245101 is an apocalyptic number.

It is an amenable number.

16521245101 is a deficient number, since it is larger than the sum of its proper divisors (37294451).

16521245101 is an equidigital number, since it uses as much as digits as its factorization.

16521245101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37294450.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 16521245101 its reverse (10154212561), we get a palindrome (26675457662).

The spelling of 16521245101 in words is "sixteen billion, five hundred twenty-one million, two hundred forty-five thousand, one hundred one".