21023010210 has 64 divisors (see below), whose sum is σ = 51454942848. Its totient is φ = 5495253504.

The previous prime is 21023010191. The next prime is 21023010233. The reversal of 21023010210 is 1201032012.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1891329 + ... + 1902411.

It is an arithmetic number, because the mean of its divisors is an integer number (803983482).

Almost surely, 2^21023010210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21023010210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25727471424).

21023010210 is an abundant number, since it is smaller than the sum of its proper divisors (30431932638).

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

21023010210 is a wasteful number, since it uses less digits than its factorization.

21023010210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12339.

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

Adding to 21023010210 its reverse (1201032012), we get a palindrome (22224042222).

The spelling of 21023010210 in words is "twenty-one billion, twenty-three million, ten thousand, two hundred ten".