21221011120210 has 32 divisors (see below), whose sum is σ = 41670651699072. Its totient is φ = 7716675281280.

The previous prime is 21221011120189. The next prime is 21221011120241. The reversal of 21221011120210 is 1202111012212.

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, 16407502 + ... + 17653558.

It is an arithmetic number, because the mean of its divisors is an integer number (1302207865596).

Almost surely, 2^{21221011120210} is an apocalyptic number.

21221011120210 is a deficient number, since it is larger than the sum of its proper divisors (20449640578862).

21221011120210 is a wasteful number, since it uses less digits than its factorization.

21221011120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400898.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221011120210 its reverse (1202111012212), we get a palindrome (22423122132422).

The spelling of 21221011120210 in words is "twenty-one trillion, two hundred twenty-one billion, eleven million, one hundred twenty thousand, two hundred ten".