21022111002 has 8 divisors (see below), whose sum is σ = 42044222016. Its totient is φ = 7007370332.

The previous prime is 21022110997. The next prime is 21022111027. The reversal of 21022111002 is 20011122012.

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

21022111002 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1751842578 + ... + 1751842589.

It is an arithmetic number, because the mean of its divisors is an integer number (5255527752).

Almost surely, 2^21022111002 is an apocalyptic number.

21022111002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022111002 is a wasteful number, since it uses less digits than its factorization.

21022111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503685172.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21022111002 its reverse (20011122012), we get a palindrome (41033233014).

The spelling of 21022111002 in words is "twenty-one billion, twenty-two million, one hundred eleven thousand, two".