101220113111 has 4 divisors (see below), whose sum is σ = 109006275672. Its totient is φ = 93433950552.

The previous prime is 101220113077. The next prime is 101220113143. The reversal of 101220113111 is 111311022101.

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 101220113111 - 2²² = 101215918807 is a prime.

It is a super-2 number, since 2×101220113111² (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 (101220110111) 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, 3893081261 + ... + 3893081286.

It is an arithmetic number, because the mean of its divisors is an integer number (27251568918).

Almost surely, 2^101220113111 is an apocalyptic number.

101220113111 is a deficient number, since it is larger than the sum of its proper divisors (7786162561).

101220113111 is an equidigital number, since it uses as much as digits as its factorization.

101220113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7786162560.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 101220113111 its reverse (111311022101), we get a palindrome (212531135212).

The spelling of 101220113111 in words is "one hundred one billion, two hundred twenty million, one hundred thirteen thousand, one hundred eleven".