21112021022210 has 32 divisors (see below), whose sum is σ = 38139427558512. Its totient is φ = 8414192496640.

The previous prime is 21112021022153. The next prime is 21112021022237. The reversal of 21112021022210 is 1222012021112.

It can be written as a sum of positive squares in 8 ways, for example, as 15956837149201 + 5155183873009 = 3994601^2 + 2270503^2 .

It is a Curzon number.

It is an unprimeable number.

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, 43066802 + ... + 43554258.

Almost surely, 2^{21112021022210} is an apocalyptic number.

21112021022210 is a deficient number, since it is larger than the sum of its proper divisors (17027406536302).

21112021022210 is a wasteful number, since it uses less digits than its factorization.

21112021022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503158.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112021022210 its reverse (1222012021112), we get a palindrome (22334033043322).

The spelling of 21112021022210 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, twenty-two thousand, two hundred ten".