21320232101 has 16 divisors (see below), whose sum is σ = 26273976960. Its totient is φ = 16890405120.

The previous prime is 21320232091. The next prime is 21320232121. The reversal of 21320232101 is 10123202312.

It is a cyclic number.

It is not a de Polignac number, because 21320232101 - 2¹⁰ = 21320231077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21320232101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320232121) 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, 1949456 + ... + 1960361.

It is an arithmetic number, because the mean of its divisors is an integer number (1642123560).

Almost surely, 2^21320232101 is an apocalyptic number.

It is an amenable number.

21320232101 is a deficient number, since it is larger than the sum of its proper divisors (4953744859).

21320232101 is a wasteful number, since it uses less digits than its factorization.

21320232101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909884.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21320232101 its reverse (10123202312), we get a palindrome (31443434413).

The spelling of 21320232101 in words is "twenty-one billion, three hundred twenty million, two hundred thirty-two thousand, one hundred one".