111220210101 has 64 divisors (see below), whose sum is σ = 199501424640. Its totient is φ = 53226858240.

The previous prime is 111220210093. The next prime is 111220210121. The reversal of 111220210101 is 101012022111.

It is not a de Polignac number, because 111220210101 - 2³ = 111220210093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220210121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1492146 + ... + 1564908.

It is an arithmetic number, because the mean of its divisors is an integer number (3117209760).

Almost surely, 2^111220210101 is an apocalyptic number.

111220210101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111220210101 is a deficient number, since it is larger than the sum of its proper divisors (88281214539).

111220210101 is a wasteful number, since it uses less digits than its factorization.

111220210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73306.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111220210101 its reverse (101012022111), we get a palindrome (212232232212).

The spelling of 111220210101 in words is "one hundred eleven billion, two hundred twenty million, two hundred ten thousand, one hundred one".