21022101002 has 16 divisors (see below), whose sum is σ = 36039831360. Its totient is φ = 9008985888.

The previous prime is 21022100999. The next prime is 21022101017. The reversal of 21022101002 is 20010122012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376073 + ... + 428339.

It is an arithmetic number, because the mean of its divisors is an integer number (2252489460).

Almost surely, 2^21022101002 is an apocalyptic number.

21022101002 is a deficient number, since it is larger than the sum of its proper divisors (15017730358).

21022101002 is a wasteful number, since it uses less digits than its factorization.

21022101002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81005.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21022101002 its reverse (20010122012), we get a palindrome (41032223014).

The spelling of 21022101002 in words is "twenty-one billion, twenty-two million, one hundred one thousand, two".