21020102222010 has 16 divisors (see below), whose sum is σ = 50448245332896. Its totient is φ = 5605360592528.

The previous prime is 21020102221997. The next prime is 21020102222017. The reversal of 21020102222010 is 1022220102012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21020102222017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350335037004 + ... + 350335037063.

It is an arithmetic number, because the mean of its divisors is an integer number (3153015333306).

Almost surely, 2^{21020102222010} is an apocalyptic number.

21020102222010 is an abundant number, since it is smaller than the sum of its proper divisors (29428143110886).

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

21020102222010 is a wasteful number, since it uses less digits than its factorization.

21020102222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700670074077.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21020102222010 its reverse (1022220102012), we get a palindrome (22042322324022).

The spelling of 21020102222010 in words is "twenty-one trillion, twenty billion, one hundred two million, two hundred twenty-two thousand, ten".