1000021000193 has 4 divisors (see below), whose sum is σ = 1001083722708. Its totient is φ = 998958277680.

The previous prime is 1000021000129. The next prime is 1000021000207. The reversal of 1000021000193 is 3910001200001.

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 537535316224 + 462485683969 = 733168^2 + 680063^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000021000193 - 2⁶ = 1000021000129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000021000103) 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, 531359846 + ... + 531361727.

It is an arithmetic number, because the mean of its divisors is an integer number (250270930677).

Almost surely, 2^{1000021000193} is an apocalyptic number.

It is an amenable number.

1000021000193 is a deficient number, since it is larger than the sum of its proper divisors (1062722515).

1000021000193 is an equidigital number, since it uses as much as digits as its factorization.

1000021000193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062722514.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 1000021000193 its reverse (3910001200001), we get a palindrome (4910022200194).

The spelling of 1000021000193 in words is "one trillion, twenty-one million, one hundred ninety-three", and thus it is an aban number.