21011102210 has 16 divisors (see below), whose sum is σ = 43222838976. Its totient is φ = 7203806448.

The previous prime is 21011102191. The next prime is 21011102219. The reversal of 21011102210 is 1220111012.

It is a junction number, because it is equal to n+sod(n) for n = 21011102191 and 21011102200.

It is not an unprimeable number, because it can be changed into a prime (21011102219) 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, 150079232 + ... + 150079371.

It is an arithmetic number, because the mean of its divisors is an integer number (2701427436).

Almost surely, 2^21011102210 is an apocalyptic number.

21011102210 is an abundant number, since it is smaller than the sum of its proper divisors (22211736766).

21011102210 is a wasteful number, since it uses less digits than its factorization.

21011102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300158617.

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

Adding to 21011102210 its reverse (1220111012), we get a palindrome (22231213222).

The spelling of 21011102210 in words is "twenty-one billion, eleven million, one hundred two thousand, two hundred ten".