21002141213 has 2 divisors, whose sum is σ = 21002141214. Its totient is φ = 21002141212.

The previous prime is 21002141191. The next prime is 21002141221. The reversal of 21002141213 is 31214120012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20972253124 + 29888089 = 144818^2 + 5467^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002141213 - 2³⁰ = 19928399389 is a prime.

It is a super-2 number, since 2×21002141213² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002141191 and 21002141200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002141273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501070606 + 10501070607.

It is an arithmetic number, because the mean of its divisors is an integer number (10501070607).

Almost surely, 2^21002141213 is an apocalyptic number.

It is an amenable number.

21002141213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002141213 is an equidigital number, since it uses as much as digits as its factorization.

21002141213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21002141213 its reverse (31214120012), we get a palindrome (52216261225).

The spelling of 21002141213 in words is "twenty-one billion, two million, one hundred forty-one thousand, two hundred thirteen".