202110121001 has 2 divisors, whose sum is σ = 202110121002. Its totient is φ = 202110121000.

The previous prime is 202110120943. The next prime is 202110121061. The reversal of 202110121001 is 100121011202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114907440400 + 87202680601 = 338980^2 + 295301^2 .

It is a cyclic number.

It is not a de Polignac number, because 202110121001 - 2¹⁸ = 202109858857 is a prime.

It is a super-2 number, since 2×202110121001² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (202110121061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055060500 + 101055060501.

It is an arithmetic number, because the mean of its divisors is an integer number (101055060501).

Almost surely, 2^202110121001 is an apocalyptic number.

It is an amenable number.

202110121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

202110121001 is an equidigital number, since it uses as much as digits as its factorization.

202110121001 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 11.

Adding to 202110121001 its reverse (100121011202), we get a palindrome (302231132203).

The spelling of 202110121001 in words is "two hundred two billion, one hundred ten million, one hundred twenty-one thousand, one".