21200011002 has 24 divisors (see below), whose sum is σ = 46173853440. Its totient is φ = 7029670920.

The previous prime is 21200010991. The next prime is 21200011043. The reversal of 21200011002 is 20011000212.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3079752 + ... + 3086627.

It is an arithmetic number, because the mean of its divisors is an integer number (1923910560).

Almost surely, 2^21200011002 is an apocalyptic number.

21200011002 is an abundant number, since it is smaller than the sum of its proper divisors (24973842438).

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

21200011002 is a wasteful number, since it uses less digits than its factorization.

21200011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6166578 (or 6166575 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21200011002 its reverse (20011000212), we get a palindrome (41211011214).

The spelling of 21200011002 in words is "twenty-one billion, two hundred million, eleven thousand, two".