221110120021211 has 4 divisors (see below), whose sum is σ = 221110204778424. Its totient is φ = 221110035264000.

The previous prime is 221110120021139. The next prime is 221110120021261. The reversal of 221110120021211 is 112120021011122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221110120021211 - 2¹⁴ = 221110120004827 is a prime.

It is a super-2 number, since 2×221110120021211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221110120021211.

It is not an unprimeable number, because it can be changed into a prime (221110120021261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38337005 + ... + 43725806.

It is an arithmetic number, because the mean of its divisors is an integer number (55277551194606).

Almost surely, 2^{221110120021211} is an apocalyptic number.

221110120021211 is a deficient number, since it is larger than the sum of its proper divisors (84757213).

221110120021211 is an equidigital number, since it uses as much as digits as its factorization.

221110120021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84757212.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221110120021211 its reverse (112120021011122), we get a palindrome (333230141032333).

The spelling of 221110120021211 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twenty million, twenty-one thousand, two hundred eleven".