21021132323101 has 16 divisors (see below), whose sum is σ = 21267932883840. Its totient is φ = 20775120811200.

The previous prime is 21021132323083. The next prime is 21021132323201. The reversal of 21021132323101 is 10132323112012.

It is a cyclic number.

It is not a de Polignac number, because 21021132323101 - 2¹¹ = 21021132321053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021132323201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138656526 + ... + 138808048.

It is an arithmetic number, because the mean of its divisors is an integer number (1329245805240).

Almost surely, 2^{21021132323101} is an apocalyptic number.

It is an amenable number.

21021132323101 is a deficient number, since it is larger than the sum of its proper divisors (246800560739).

21021132323101 is a wasteful number, since it uses less digits than its factorization.

21021132323101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154116.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21021132323101 its reverse (10132323112012), we get a palindrome (31153455435113).

The spelling of 21021132323101 in words is "twenty-one trillion, twenty-one billion, one hundred thirty-two million, three hundred twenty-three thousand, one hundred one".