21413505101 has 4 divisors (see below), whose sum is σ = 21576967104. Its totient is φ = 21250043100.

The previous prime is 21413505089. The next prime is 21413505107. The reversal of 21413505101 is 10150531412.

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 21413505101 - 2³⁰ = 20339763277 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 (21413505107) 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, 81730805 + ... + 81731066.

It is an arithmetic number, because the mean of its divisors is an integer number (5394241776).

Almost surely, 2^21413505101 is an apocalyptic number.

It is an amenable number.

21413505101 is a deficient number, since it is larger than the sum of its proper divisors (163462003).

21413505101 is a wasteful number, since it uses less digits than its factorization.

21413505101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163462002.

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 21413505101 in words is "twenty-one billion, four hundred thirteen million, five hundred five thousand, one hundred one".