21210211010 has 32 divisors (see below), whose sum is σ = 38295244800. Its totient is φ = 8458152640.

The previous prime is 21210210991. The next prime is 21210211027. The reversal of 21210211010 is 1011201212.

It is a junction number, because it is equal to n+sod(n) for n = 21210210982 and 21210211000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8184815 + ... + 8187405.

It is an arithmetic number, because the mean of its divisors is an integer number (1196726400).

Almost surely, 2^21210211010 is an apocalyptic number.

21210211010 is a deficient number, since it is larger than the sum of its proper divisors (17085033790).

21210211010 is a wasteful number, since it uses less digits than its factorization.

21210211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786.

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

Adding to 21210211010 its reverse (1011201212), we get a palindrome (22221412222).

The spelling of 21210211010 in words is "twenty-one billion, two hundred ten million, two hundred eleven thousand, ten".