101221320111 has 4 divisors (see below), whose sum is σ = 134961760152. Its totient is φ = 67480880072.

The previous prime is 101221320097. The next prime is 101221320113. The reversal of 101221320111 is 111023122101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111023122101 = 3 ⋅37007707367.

It is a cyclic number.

It is not a de Polignac number, because 101221320111 - 2¹⁸ = 101221057967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221320113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16870220016 + ... + 16870220021.

It is an arithmetic number, because the mean of its divisors is an integer number (33740440038).

Almost surely, 2^101221320111 is an apocalyptic number.

101221320111 is a deficient number, since it is larger than the sum of its proper divisors (33740440041).

101221320111 is an equidigital number, since it uses as much as digits as its factorization.

101221320111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33740440040.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 101221320111 its reverse (111023122101), we get a palindrome (212244442212).

The spelling of 101221320111 in words is "one hundred one billion, two hundred twenty-one million, three hundred twenty thousand, one hundred eleven".