111212012101 has 8 divisors (see below), whose sum is σ = 116102388600. Its totient is φ = 106392000960.

The previous prime is 111212012099. The next prime is 111212012117. The reversal of 111212012101 is 101210212111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33206315076 + 78005697025 = 182226^2 + 279295^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 111212012101 - 2¹ = 111212012099 is a prime.

It is a super-2 number, since 2×111212012101² (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 (111212016101) 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, 17588110 + ... + 17594431.

It is an arithmetic number, because the mean of its divisors is an integer number (14512798575).

Almost surely, 2^111212012101 is an apocalyptic number.

It is an amenable number.

111212012101 is a deficient number, since it is larger than the sum of its proper divisors (4890376499).

111212012101 is a wasteful number, since it uses less digits than its factorization.

111212012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35182679.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111212012101 its reverse (101210212111), we get a palindrome (212422224212).

The spelling of 111212012101 in words is "one hundred eleven billion, two hundred twelve million, twelve thousand, one hundred one".