21022001007 has 8 divisors (see below), whose sum is σ = 32033525376. Its totient is φ = 12012571992.

The previous prime is 21022000903. The next prime is 21022001029. The reversal of 21022001007 is 70010022012.

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

It is not a de Polignac number, because 21022001007 - 2¹² = 21021996911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022001057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500523813 + ... + 500523854.

It is an arithmetic number, because the mean of its divisors is an integer number (4004190672).

Almost surely, 2^21022001007 is an apocalyptic number.

21022001007 is a deficient number, since it is larger than the sum of its proper divisors (11011524369).

21022001007 is a wasteful number, since it uses less digits than its factorization.

21022001007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001047677.

The product of its (nonzero) digits is 56, while the sum is 15.

Adding to 21022001007 its reverse (70010022012), we get a palindrome (91032023019).

The spelling of 21022001007 in words is "twenty-one billion, twenty-two million, one thousand, seven".