10000211010021 has 6 divisors (see below), whose sum is σ = 14444749236710. Its totient is φ = 6666807340008.

The previous prime is 10000211010017. The next prime is 10000211010059. The reversal of 10000211010021 is 12001011200001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9860943965796 + 139267044225 = 3140214^2 + 373185^2 .

It is not a de Polignac number, because 10000211010021 - 2² = 10000211010017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1111134556669 = 10000211010021 / (1 + 0 + 0 + 0 + 0 + 2 + 1 + 1 + 0 + 1 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10000211009985 and 10000211010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000211015021) 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 5 ways as a sum of consecutive naturals, for example, 555567278326 + ... + 555567278343.

Almost surely, 2^{10000211010021} is an apocalyptic number.

It is an amenable number.

10000211010021 is a deficient number, since it is larger than the sum of its proper divisors (4444538226689).

10000211010021 is a wasteful number, since it uses less digits than its factorization.

10000211010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111134556675 (or 1111134556672 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10000211010021 its reverse (12001011200001), we get a palindrome (22001222210022).

The spelling of 10000211010021 in words is "ten trillion, two hundred eleven million, ten thousand, twenty-one".