221010212111 has 16 divisors (see below), whose sum is σ = 256370903040. Its totient is φ = 188844622560.

The previous prime is 221010212089. The next prime is 221010212123. The reversal of 221010212111 is 111212010122.

It is a cyclic number.

It is not a de Polignac number, because 221010212111 - 2⁶ = 221010212047 is a prime.

It is a super-2 number, since 2×221010212111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010212131) 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, 11912741 + ... + 11931278.

It is an arithmetic number, because the mean of its divisors is an integer number (16023181440).

Almost surely, 2^221010212111 is an apocalyptic number.

221010212111 is a deficient number, since it is larger than the sum of its proper divisors (35360690929).

221010212111 is a wasteful number, since it uses less digits than its factorization.

221010212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23844086.

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

Adding to 221010212111 its reverse (111212010122), we get a palindrome (332222222233).

The spelling of 221010212111 in words is "two hundred twenty-one billion, ten million, two hundred twelve thousand, one hundred eleven".