221010110021211 has 16 divisors (see below), whose sum is σ = 347641094719488. Its totient is φ = 122217572361600.

The previous prime is 221010110021147. The next prime is 221010110021237. The reversal of 221010110021211 is 112120011010122.

It is a happy number.

It is not a de Polignac number, because 221010110021211 - 2⁶ = 221010110021147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221010110021011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169746627630 + ... + 169746628931.

It is an arithmetic number, because the mean of its divisors is an integer number (21727568419968).

Almost surely, 2^{221010110021211} is an apocalyptic number.

221010110021211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221010110021211 is a deficient number, since it is larger than the sum of its proper divisors (126630984698277).

221010110021211 is a wasteful number, since it uses less digits than its factorization.

221010110021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339493256602.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221010110021211 its reverse (112120011010122), we get a palindrome (333130121031333).

The spelling of 221010110021211 in words is "two hundred twenty-one trillion, ten billion, one hundred ten million, twenty-one thousand, two hundred eleven".