101002201021 has 2 divisors, whose sum is σ = 101002201022. Its totient is φ = 101002201020.

The previous prime is 101002201009. The next prime is 101002201039. The reversal of 101002201021 is 120102200101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83871056025 + 17131144996 = 289605^2 + 130886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101002201021 is a prime.

It is a super-2 number, since 2×101002201021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101002200989 and 101002201007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101002205021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50501100510 + 50501100511.

It is an arithmetic number, because the mean of its divisors is an integer number (50501100511).

Almost surely, 2^101002201021 is an apocalyptic number.

It is an amenable number.

101002201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101002201021 is an equidigital number, since it uses as much as digits as its factorization.

101002201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101002201021 its reverse (120102200101), we get a palindrome (221104401122).

The spelling of 101002201021 in words is "one hundred one billion, two million, two hundred one thousand, twenty-one".