100321231120021 has 8 divisors (see below), whose sum is σ = 106239338158104. Its totient is φ = 94404997209600.

The previous prime is 100321231120007. The next prime is 100321231120037. The reversal of 100321231120021 is 120021132123001.

It can be written as a sum of positive squares in 4 ways, for example, as 20742431836996 + 79578799283025 = 4554386^2 + 8920695^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100321231120021 - 2¹¹ = 100321231117973 is a prime.

It is a super-2 number, since 2×100321231120021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100321231190021) 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, 468171640 + ... + 468385873.

It is an arithmetic number, because the mean of its divisors is an integer number (13279917269763).

Almost surely, 2^{100321231120021} is an apocalyptic number.

It is an amenable number.

100321231120021 is a deficient number, since it is larger than the sum of its proper divisors (5918107038083).

100321231120021 is an equidigital number, since it uses as much as digits as its factorization.

100321231120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936563831.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 100321231120021 its reverse (120021132123001), we get a palindrome (220342363243022).

The spelling of 100321231120021 in words is "one hundred trillion, three hundred twenty-one billion, two hundred thirty-one million, one hundred twenty thousand, twenty-one".