10021020022021 has 4 divisors (see below), whose sum is σ = 10158294268972. Its totient is φ = 9883745775072.

The previous prime is 10021020022007. The next prime is 10021020022081. The reversal of 10021020022021 is 12022002012001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6565324919521 + 3455695102500 = 2562289^2 + 1858950^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021020022021 - 2¹⁹ = 10021019497733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021020021992 and 10021020022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021020022081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68637123366 + ... + 68637123511.

It is an arithmetic number, because the mean of its divisors is an integer number (2539573567243).

Almost surely, 2^{10021020022021} is an apocalyptic number.

It is an amenable number.

10021020022021 is a deficient number, since it is larger than the sum of its proper divisors (137274246951).

10021020022021 is an equidigital number, since it uses as much as digits as its factorization.

10021020022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137274246950.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10021020022021 its reverse (12022002012001), we get a palindrome (22043022034022).

The spelling of 10021020022021 in words is "ten trillion, twenty-one billion, twenty million, twenty-two thousand, twenty-one".