10102021001 has 2 divisors, whose sum is σ = 10102021002. Its totient is φ = 10102021000.

The previous prime is 10102020997. The next prime is 10102021009. The reversal of 10102021001 is 10012020101.

It is an a-pointer prime, because the next prime (10102021009) can be obtained adding 10102021001 to its sum of digits (8).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8593475401 + 1508545600 = 92701^2 + 38840^2 .

It is an emirp because it is prime and its reverse (10012020101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10102021001 - 2² = 10102020997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10102021001.

It is not a weakly prime, because it can be changed into another prime (10102021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051010500 + 5051010501.

It is an arithmetic number, because the mean of its divisors is an integer number (5051010501).

Almost surely, 2^10102021001 is an apocalyptic number.

It is an amenable number.

10102021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

10102021001 is an equidigital number, since it uses as much as digits as its factorization.

10102021001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 10102021001 its reverse (10012020101), we get a palindrome (20114041102).

The spelling of 10102021001 in words is "ten billion, one hundred two million, twenty-one thousand, one".