21023232101 has 8 divisors (see below), whose sum is σ = 21225388800. Its totient is φ = 20821244400.

The previous prime is 21023232091. The next prime is 21023232107. The reversal of 21023232101 is 10123232012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023232101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21023232101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023232107) 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, 215240 + ... + 297278.

It is an arithmetic number, because the mean of its divisors is an integer number (2653173600).

Almost surely, 2^21023232101 is an apocalyptic number.

It is an amenable number.

21023232101 is a deficient number, since it is larger than the sum of its proper divisors (202156699).

21023232101 is a wasteful number, since it uses less digits than its factorization.

21023232101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84499.

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

Adding to 21023232101 its reverse (10123232012), we get a palindrome (31146464113).

The spelling of 21023232101 in words is "twenty-one billion, twenty-three million, two hundred thirty-two thousand, one hundred one".