10021220122021 has 2 divisors, whose sum is σ = 10021220122022. Its totient is φ = 10021220122020.

The previous prime is 10021220122007. The next prime is 10021220122073. The reversal of 10021220122021 is 12022102212001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7001580602500 + 3019639519521 = 2646050^2 + 1737711^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021220122021 - 2⁵ = 10021220121989 is a prime.

It is a super-2 number, since 2×10021220122021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10021220121986 and 10021220122004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021220123021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010610061010 + 5010610061011.

It is an arithmetic number, because the mean of its divisors is an integer number (5010610061011).

Almost surely, 2^{10021220122021} is an apocalyptic number.

It is an amenable number.

10021220122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021220122021 is an equidigital number, since it uses as much as digits as its factorization.

10021220122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10021220122021 its reverse (12022102212001), we get a palindrome (22043322334022).

The spelling of 10021220122021 in words is "ten trillion, twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".