1000211000021 has 4 divisors (see below), whose sum is σ = 1000260809100. Its totient is φ = 1000161190944.

The previous prime is 1000211000011. The next prime is 1000211000059. The reversal of 1000211000021 is 1200001120001.

1000211000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 197923552996 + 802287447025 = 444886^2 + 895705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000211000021 - 2³⁸ = 725333093077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000210999972 and 1000211000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000211000011) 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, 24874406 + ... + 24914583.

It is an arithmetic number, because the mean of its divisors is an integer number (250065202275).

Almost surely, 2^{1000211000021} is an apocalyptic number.

It is an amenable number.

1000211000021 is a deficient number, since it is larger than the sum of its proper divisors (49809079).

1000211000021 is an equidigital number, since it uses as much as digits as its factorization.

1000211000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49809078.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1000211000021 its reverse (1200001120001), we get a palindrome (2200212120022).

The spelling of 1000211000021 in words is "one trillion, two hundred eleven million, twenty-one", and thus it is an aban number.