1000010000021 has 8 divisors (see below), whose sum is σ = 1034524138080. Its totient is φ = 965497930992.

The previous prime is 1000009999981. The next prime is 1000010000023. The reversal of 1000010000021 is 1200000100001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000010000021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000010000023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500006 + ... + 1500008.

It is an arithmetic number, because the mean of its divisors is an integer number (129315517260).

Almost surely, 2^{1000010000021} is an apocalyptic number.

It is an amenable number.

1000010000021 is a deficient number, since it is larger than the sum of its proper divisors (34514138059).

1000010000021 is a wasteful number, since it uses less digits than its factorization.

1000010000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034515.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 1000010000021 its reverse (1200000100001), we get a palindrome (2200010100022).

The spelling of 1000010000021 in words is "one trillion, ten million, twenty-one", and thus it is an aban number and an uban number.