221221201010111 has 8 divisors (see below), whose sum is σ = 222628956691680. Its totient is φ = 219817286409312.

The previous prime is 221221201010071. The next prime is 221221201010113. The reversal of 221221201010111 is 111010102122122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221221201010111 - 2¹⁰ = 221221201009087 is a prime.

It is a super-2 number, since 2×221221201010111² (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 221221201010111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221201010113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960154640 + ... + 960385013.

It is an arithmetic number, because the mean of its divisors is an integer number (27828619586460).

Almost surely, 2^{221221201010111} is an apocalyptic number.

221221201010111 is a deficient number, since it is larger than the sum of its proper divisors (1407755681569).

221221201010111 is a wasteful number, since it uses less digits than its factorization.

221221201010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920540385.

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

Adding to 221221201010111 its reverse (111010102122122), we get a palindrome (332231303132233).

The spelling of 221221201010111 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, ten thousand, one hundred eleven".