1001010021994 has 8 divisors (see below), whose sum is σ = 1501519337028. Its totient is φ = 500503576320.

The previous prime is 1001010021989. The next prime is 1001010022087. The reversal of 1001010021994 is 4991200101001.

It can be written as a sum of positive squares in 2 ways, for example, as 986952837025 + 14057184969 = 993455^2 + 118563^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779464 + ... + 1615420.

Almost surely, 2^{1001010021994} is an apocalyptic number.

1001010021994 is a deficient number, since it is larger than the sum of its proper divisors (500509315034).

1001010021994 is an equidigital number, since it uses as much as digits as its factorization.

1001010021994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434680.

The product of its (nonzero) digits is 648, while the sum is 28.

Adding to 1001010021994 its reverse (4991200101001), we get a palindrome (5992210122995).

The spelling of 1001010021994 in words is "one trillion, one billion, ten million, twenty-one thousand, nine hundred ninety-four".