21210031002 has 8 divisors (see below), whose sum is σ = 42420062016. Its totient is φ = 7070010332.

The previous prime is 21210030979. The next prime is 21210031013. The reversal of 21210031002 is 20013001212.

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

21210031002 is an admirable number.

It is a super-2 number, since 2×21210031002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767502578 + ... + 1767502589.

It is an arithmetic number, because the mean of its divisors is an integer number (5302507752).

Almost surely, 2^21210031002 is an apocalyptic number.

21210031002 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.

21210031002 is a wasteful number, since it uses less digits than its factorization.

21210031002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535005172.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21210031002 its reverse (20013001212), we get a palindrome (41223032214).

The spelling of 21210031002 in words is "twenty-one billion, two hundred ten million, thirty-one thousand, two".