10202121001 has 2 divisors, whose sum is σ = 10202121002. Its totient is φ = 10202121000.

The previous prime is 10202120993. The next prime is 10202121019. The reversal of 10202121001 is 10012120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9319971600 + 882149401 = 96540^2 + 29701^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202121001 - 2³ = 10202120993 is a prime.

It is not a weakly prime, because it can be changed into another prime (10212121001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101060500 + 5101060501.

It is an arithmetic number, because the mean of its divisors is an integer number (5101060501).

Almost surely, 2^10202121001 is an apocalyptic number.

It is an amenable number.

10202121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202121001 is an equidigital number, since it uses as much as digits as its factorization.

10202121001 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 10202121001 its reverse (10012120201), we get a palindrome (20214241202).

The spelling of 10202121001 in words is "ten billion, two hundred two million, one hundred twenty-one thousand, one".