21423442101 has 8 divisors (see below), whose sum is σ = 28567020384. Its totient is φ = 14281079280.

The previous prime is 21423442097. The next prime is 21423442133. The reversal of 21423442101 is 10124432412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21423442101 - 2² = 21423442097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21423442501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261910 + ... + 333831.

It is an arithmetic number, because the mean of its divisors is an integer number (3570877548).

Almost surely, 2^21423442101 is an apocalyptic number.

It is an amenable number.

21423442101 is a deficient number, since it is larger than the sum of its proper divisors (7143578283).

21423442101 is a wasteful number, since it uses less digits than its factorization.

21423442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607731.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21423442101 its reverse (10124432412), we get a palindrome (31547874513).

The spelling of 21423442101 in words is "twenty-one billion, four hundred twenty-three million, four hundred forty-two thousand, one hundred one".