10202143220021 has 2 divisors, whose sum is σ = 10202143220022. Its totient is φ = 10202143220020.

The previous prime is 10202143219991. The next prime is 10202143220051. The reversal of 10202143220021 is 12002234120201.

It is a balanced prime because it is at equal distance from previous prime (10202143219991) and next prime (10202143220051).

It can be written as a sum of positive squares in only one way, i.e., 9382955311921 + 819187908100 = 3063161^2 + 905090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10202143220021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10202143219975 and 10202143220002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202143220051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101071610010 + 5101071610011.

It is an arithmetic number, because the mean of its divisors is an integer number (5101071610011).

Almost surely, 2^{10202143220021} is an apocalyptic number.

It is an amenable number.

10202143220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202143220021 is an equidigital number, since it uses as much as digits as its factorization.

10202143220021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 10202143220021 its reverse (12002234120201), we get a palindrome (22204377340222).

The spelling of 10202143220021 in words is "ten trillion, two hundred two billion, one hundred forty-three million, two hundred twenty thousand, twenty-one".