10021211012221 has 2 divisors, whose sum is σ = 10021211012222. Its totient is φ = 10021211012220.

The previous prime is 10021211012143. The next prime is 10021211012249. The reversal of 10021211012221 is 12221011212001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9928889228196 + 92321784025 = 3151014^2 + 303845^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021211012221 - 2¹⁹ = 10021210487933 is a prime.

It is a super-2 number, since 2×10021211012221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10021211012195 and 10021211012204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021211012261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010605506110 + 5010605506111.

It is an arithmetic number, because the mean of its divisors is an integer number (5010605506111).

Almost surely, 2^{10021211012221} is an apocalyptic number.

It is an amenable number.

10021211012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021211012221 is an equidigital number, since it uses as much as digits as its factorization.

10021211012221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 10021211012221 its reverse (12221011212001), we get a palindrome (22242222224222).

The spelling of 10021211012221 in words is "ten trillion, twenty-one billion, two hundred eleven million, twelve thousand, two hundred twenty-one".