101020021321 has 4 divisors (see below), whose sum is σ = 101022837444. Its totient is φ = 101017205200.

The previous prime is 101020021301. The next prime is 101020021327. The reversal of 101020021321 is 123120020101.

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 93159248400 + 7860772921 = 305220^2 + 88661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101020021321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101020021327) 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, 1353550 + ... + 1426231.

It is an arithmetic number, because the mean of its divisors is an integer number (25255709361).

Almost surely, 2^101020021321 is an apocalyptic number.

It is an amenable number.

101020021321 is a deficient number, since it is larger than the sum of its proper divisors (2816123).

101020021321 is an equidigital number, since it uses as much as digits as its factorization.

101020021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816122.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 101020021321 its reverse (123120020101), we get a palindrome (224140041422).

The spelling of 101020021321 in words is "one hundred one billion, twenty million, twenty-one thousand, three hundred twenty-one".