21202213004 has 48 divisors (see below), whose sum is σ = 44279198208. Its totient is φ = 8685481728.

The previous prime is 21202212991. The next prime is 21202213009. The reversal of 21202213004 is 40031220212.

It is a super-3 number, since 3×21202213004³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21202213009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 970004 + ... + 991620.

It is an arithmetic number, because the mean of its divisors is an integer number (922483296).

Almost surely, 2^21202213004 is an apocalyptic number.

It is an amenable number.

21202213004 is an abundant number, since it is smaller than the sum of its proper divisors (23076985204).

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

21202213004 is a wasteful number, since it uses less digits than its factorization.

21202213004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23174 (or 23172 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21202213004 its reverse (40031220212), we get a palindrome (61233433216).

The spelling of 21202213004 in words is "twenty-one billion, two hundred two million, two hundred thirteen thousand, four".