221010110021210 has 16 divisors (see below), whose sum is σ = 421219268511336. Its totient is φ = 83203806125568.

The previous prime is 221010110021147. The next prime is 221010110021237. The reversal of 221010110021210 is 12120011010122.

221010110021210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 220534588065649 + 475521955561 = 14850407^2 + 689581^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650029735187 + ... + 650029735526.

Almost surely, 2^{221010110021210} is an apocalyptic number.

221010110021210 is a deficient number, since it is larger than the sum of its proper divisors (200209158490126).

221010110021210 is a wasteful number, since it uses less digits than its factorization.

221010110021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300059470737.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221010110021210 its reverse (12120011010122), we get a palindrome (233130121031332).

The spelling of 221010110021210 in words is "two hundred twenty-one trillion, ten billion, one hundred ten million, twenty-one thousand, two hundred ten".