105201525421 has 4 divisors (see below), whose sum is σ = 105202174432. Its totient is φ = 105200876412.

The previous prime is 105201525367. The next prime is 105201525439. The reversal of 105201525421 is 124525102501.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 105201525421 - 2¹⁵ = 105201492653 is a prime.

It is a super-2 number, since 2×105201525421² (a number of 23 digits) contains 22 as substring.

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 105201525421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105201525491) 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, 147106 + ... + 481708.

It is an arithmetic number, because the mean of its divisors is an integer number (26300543608).

Almost surely, 2^105201525421 is an apocalyptic number.

It is an amenable number.

105201525421 is a deficient number, since it is larger than the sum of its proper divisors (649011).

105201525421 is an equidigital number, since it uses as much as digits as its factorization.

105201525421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649010.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 105201525421 its reverse (124525102501), we get a palindrome (229726627922).

The spelling of 105201525421 in words is "one hundred five billion, two hundred one million, five hundred twenty-five thousand, four hundred twenty-one".