10001211022021 has 12 divisors (see below), whose sum is σ = 10455724590220. Its totient is φ = 9565668984960.

The previous prime is 10001211022013. The next prime is 10001211022037. The reversal of 10001211022021 is 12022011210001.

It can be written as a sum of positive squares in 2 ways, for example, as 7636655902500 + 2364555119521 = 2763450^2 + 1537711^2 .

It is not a de Polignac number, because 10001211022021 - 2³ = 10001211022013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001211021992 and 10001211022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001211022321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6539341 + ... + 7922461.

Almost surely, 2^{10001211022021} is an apocalyptic number.

It is an amenable number.

10001211022021 is a deficient number, since it is larger than the sum of its proper divisors (454513568199).

10001211022021 is a wasteful number, since it uses less digits than its factorization.

10001211022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396836 (or 1396813 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10001211022021 its reverse (12022011210001), we get a palindrome (22023222232022).

The spelling of 10001211022021 in words is "ten trillion, one billion, two hundred eleven million, twenty-two thousand, twenty-one".