201323101021 has 16 divisors (see below), whose sum is σ = 230713781760. Its totient is φ = 172090195200.

The previous prime is 201323101009. The next prime is 201323101033. The reversal of 201323101021 is 120101323102.

It is an interprime number because it is at equal distance from previous prime (201323101009) and next prime (201323101033).

It is not a de Polignac number, because 201323101021 - 2¹¹ = 201323098973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201323100986 and 201323101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201323101051) 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, 18152940 + ... + 18164026.

It is an arithmetic number, because the mean of its divisors is an integer number (14419611360).

Almost surely, 2^201323101021 is an apocalyptic number.

It is an amenable number.

201323101021 is a deficient number, since it is larger than the sum of its proper divisors (29390680739).

201323101021 is a wasteful number, since it uses less digits than its factorization.

201323101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17964.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201323101021 its reverse (120101323102), we get a palindrome (321424424123).

The spelling of 201323101021 in words is "two hundred one billion, three hundred twenty-three million, one hundred one thousand, twenty-one".