10002021181 has 2 divisors, whose sum is σ = 10002021182. Its totient is φ = 10002021180.

The previous prime is 10002021151. The next prime is 10002021203. The reversal of 10002021181 is 18112020001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6883357156 + 3118664025 = 82966^2 + 55845^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002021181 - 2¹⁵ = 10001988413 is a prime.

It is a super-2 number, since 2×10002021181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002021121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001010590 + 5001010591.

It is an arithmetic number, because the mean of its divisors is an integer number (5001010591).

Almost surely, 2^10002021181 is an apocalyptic number.

It is an amenable number.

10002021181 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002021181 is an equidigital number, since it uses as much as digits as its factorization.

10002021181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10002021181 its reverse (18112020001), we get a palindrome (28114041182).

The spelling of 10002021181 in words is "ten billion, two million, twenty-one thousand, one hundred eighty-one".