21434232101 has 4 divisors (see below), whose sum is σ = 22562349600. Its totient is φ = 20306114604.

The previous prime is 21434232067. The next prime is 21434232121. The reversal of 21434232101 is 10123243412.

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 a de Polignac number, because none of the positive numbers 2^k-21434232101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434232121) 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 3 ways as a sum of consecutive naturals, for example, 564058721 + ... + 564058758.

It is an arithmetic number, because the mean of its divisors is an integer number (5640587400).

Almost surely, 2^21434232101 is an apocalyptic number.

It is an amenable number.

21434232101 is a deficient number, since it is larger than the sum of its proper divisors (1128117499).

21434232101 is a wasteful number, since it uses less digits than its factorization.

21434232101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128117498.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21434232101 its reverse (10123243412), we get a palindrome (31557475513).

The spelling of 21434232101 in words is "twenty-one billion, four hundred thirty-four million, two hundred thirty-two thousand, one hundred one".