221021211010 has 16 divisors (see below), whose sum is σ = 415135492416. Its totient is φ = 84564637168.

The previous prime is 221021210999. The next prime is 221021211011. The reversal of 221021211010 is 10112120122.

It is not an unprimeable number, because it can be changed into a prime (221021211011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 480480664 + ... + 480481123.

It is an arithmetic number, because the mean of its divisors is an integer number (25945968276).

Almost surely, 2^221021211010 is an apocalyptic number.

221021211010 is a deficient number, since it is larger than the sum of its proper divisors (194114281406).

221021211010 is a wasteful number, since it uses less digits than its factorization.

221021211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960961817.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221021211010 its reverse (10112120122), we get a palindrome (231133331132).

It can be divided in two parts, 2210212 and 11010, that added together give a palindrome (2221222).

The spelling of 221021211010 in words is "two hundred twenty-one billion, twenty-one million, two hundred eleven thousand, ten".