21353450101 has 16 divisors (see below), whose sum is σ = 22659770880. Its totient is φ = 20086799040.

The previous prime is 21353450059. The next prime is 21353450113. The reversal of 21353450101 is 10105435312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21353450101 - 2¹⁵ = 21353417333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353450161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1263630 + ... + 1280416.

It is an arithmetic number, because the mean of its divisors is an integer number (1416235680).

Almost surely, 2^21353450101 is an apocalyptic number.

It is an amenable number.

21353450101 is a deficient number, since it is larger than the sum of its proper divisors (1306320779).

21353450101 is a wasteful number, since it uses less digits than its factorization.

21353450101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17964.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21353450101 its reverse (10105435312), we get a palindrome (31458885413).

The spelling of 21353450101 in words is "twenty-one billion, three hundred fifty-three million, four hundred fifty thousand, one hundred one".