21211311010 has 64 divisors (see below), whose sum is σ = 41002375680. Its totient is φ = 7876465920.

The previous prime is 21211310951. The next prime is 21211311013. The reversal of 21211311010 is 1011311212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21211311013) 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 31 ways as a sum of consecutive naturals, for example, 3207127 + ... + 3213733.

It is an arithmetic number, because the mean of its divisors is an integer number (640662120).

Almost surely, 2^21211311010 is an apocalyptic number.

21211311010 is a deficient number, since it is larger than the sum of its proper divisors (19791064670).

21211311010 is a wasteful number, since it uses less digits than its factorization.

21211311010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21211311010 its reverse (1011311212), we get a palindrome (22222622222).

It can be divided in two parts, 2121 and 1311010, that added together give a palindrome (1313131).

The spelling of 21211311010 in words is "twenty-one billion, two hundred eleven million, three hundred eleven thousand, ten".