21211102010 has 32 divisors (see below), whose sum is σ = 45930810240. Its totient is φ = 6889620672.

The previous prime is 21211101941. The next prime is 21211102013. The reversal of 21211102010 is 1020111212.

It is a junction number, because it is equal to n+sod(n) for n = 21211101982 and 21211102000.

It is not an unprimeable number, because it can be changed into a prime (21211102013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7972769 + ... + 7975428.

It is an arithmetic number, because the mean of its divisors is an integer number (1435337820).

Almost surely, 2^21211102010 is an apocalyptic number.

21211102010 is an abundant number, since it is smaller than the sum of its proper divisors (24719708230).

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

21211102010 is a wasteful number, since it uses less digits than its factorization.

21211102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15948230.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21211102010 its reverse (1020111212), we get a palindrome (22231213222).

The spelling of 21211102010 in words is "twenty-one billion, two hundred eleven million, one hundred two thousand, ten".