101323120021 has 4 divisors (see below), whose sum is σ = 101391536844. Its totient is φ = 101254703200.

The previous prime is 101323120007. The next prime is 101323120037. The reversal of 101323120021 is 120021323101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47145436900 + 54177683121 = 217130^2 + 232761^2 .

It is a cyclic number.

It is not a de Polignac number, because 101323120021 - 2¹⁵ = 101323087253 is a prime.

It is a super-3 number, since 3×101323120021³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101323119977 and 101323120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101323120321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34206190 + ... + 34209151.

It is an arithmetic number, because the mean of its divisors is an integer number (25347884211).

Almost surely, 2^101323120021 is an apocalyptic number.

It is an amenable number.

101323120021 is a deficient number, since it is larger than the sum of its proper divisors (68416823).

101323120021 is an equidigital number, since it uses as much as digits as its factorization.

101323120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68416822.

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

Adding to 101323120021 its reverse (120021323101), we get a palindrome (221344443122).

The spelling of 101323120021 in words is "one hundred one billion, three hundred twenty-three million, one hundred twenty thousand, twenty-one".