21201010210 has 32 divisors (see below), whose sum is σ = 39237053184. Its totient is φ = 8242992000.

The previous prime is 21201010189. The next prime is 21201010213. The reversal of 21201010210 is 1201010212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21201010213) 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, 15705 + ... + 206515.

It is an arithmetic number, because the mean of its divisors is an integer number (1226157912).

Almost surely, 2^21201010210 is an apocalyptic number.

21201010210 is a deficient number, since it is larger than the sum of its proper divisors (18036042974).

21201010210 is a wasteful number, since it uses less digits than its factorization.

21201010210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191130.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21201010210 its reverse (1201010212), we get a palindrome (22402020422).

The spelling of 21201010210 in words is "twenty-one billion, two hundred one million, ten thousand, two hundred ten".