111211220210101 has 16 divisors (see below), whose sum is σ = 123903334748160. Its totient is φ = 98949463868080.

The previous prime is 111211220210087. The next prime is 111211220210113. The reversal of 111211220210101 is 101012022112111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111211220210101 is a prime.

It is a super-2 number, since 2×111211220210101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211220210501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111011520 + ... + 112008838.

It is an arithmetic number, because the mean of its divisors is an integer number (7743958421760).

Almost surely, 2^{111211220210101} is an apocalyptic number.

111211220210101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111211220210101 is a deficient number, since it is larger than the sum of its proper divisors (12692114538059).

111211220210101 is a wasteful number, since it uses less digits than its factorization.

111211220210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213064.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111211220210101 its reverse (101012022112111), we get a palindrome (212223242322212).

The spelling of 111211220210101 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twenty million, two hundred ten thousand, one hundred one".