221012211020111 has 8 divisors (see below), whose sum is σ = 257959541130240. Its totient is φ = 185408420186808.

The previous prime is 221012211020101. The next prime is 221012211020131. The reversal of 221012211020111 is 111020112210122.

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

It is a de Polignac number, because none of the positive numbers 2^k-221012211020111 is a prime.

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 221012211020111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012211020101) 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, 335884818851 + ... + 335884819508.

It is an arithmetic number, because the mean of its divisors is an integer number (32244942641280).

Almost surely, 2^{221012211020111} is an apocalyptic number.

221012211020111 is a deficient number, since it is larger than the sum of its proper divisors (36947330110129).

221012211020111 is an equidigital number, since it uses as much as digits as its factorization.

221012211020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671769638413.

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

Adding to 221012211020111 its reverse (111020112210122), we get a palindrome (332032323230233).

The spelling of 221012211020111 in words is "two hundred twenty-one trillion, twelve billion, two hundred eleven million, twenty thousand, one hundred eleven".