21010423210 has 32 divisors (see below), whose sum is σ = 43551395712. Its totient is φ = 7148581440.

The previous prime is 21010423201. The next prime is 21010423243. The reversal of 21010423210 is 1232401012.

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 15 ways as a sum of consecutive naturals, for example, 1136437 + ... + 1154776.

It is an arithmetic number, because the mean of its divisors is an integer number (1360981116).

Almost surely, 2^21010423210 is an apocalyptic number.

21010423210 is an abundant number, since it is smaller than the sum of its proper divisors (22540972502).

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

21010423210 is a wasteful number, since it uses less digits than its factorization.

21010423210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291358.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21010423210 its reverse (1232401012), we get a palindrome (22242824222).

The spelling of 21010423210 in words is "twenty-one billion, ten million, four hundred twenty-three thousand, two hundred ten".