221010120101211 has 16 divisors (see below), whose sum is σ = 336777637361664. Its totient is φ = 126291380390784.

The previous prime is 221010120101117. The next prime is 221010120101237. The reversal of 221010120101211 is 112101021010122.

It is a happy number.

It is not a de Polignac number, because 221010120101211 - 2¹⁵ = 221010120068443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221010120101311) 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, 21767830 + ... + 30263156.

It is an arithmetic number, because the mean of its divisors is an integer number (21048602335104).

Almost surely, 2^{221010120101211} is an apocalyptic number.

221010120101211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221010120101211 is a deficient number, since it is larger than the sum of its proper divisors (115767517260453).

221010120101211 is a wasteful number, since it uses less digits than its factorization.

221010120101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9734170.

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

Adding to 221010120101211 its reverse (112101021010122), we get a palindrome (333111141111333).

The spelling of 221010120101211 in words is "two hundred twenty-one trillion, ten billion, one hundred twenty million, one hundred one thousand, two hundred eleven".