111201010101 has 12 divisors (see below), whose sum is σ = 160638454080. Its totient is φ = 74127188520.

The previous prime is 111201010073. The next prime is 111201010103. The reversal of 111201010101 is 101010102111.

It is not a de Polignac number, because 111201010101 - 2⁵ = 111201010069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

111201010101 is a modest number, since divided by 1010101 gives 1112 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201010103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 463885 + ... + 661506.

It is an arithmetic number, because the mean of its divisors is an integer number (13386537840).

Almost surely, 2^111201010101 is an apocalyptic number.

It is an amenable number.

111201010101 is a deficient number, since it is larger than the sum of its proper divisors (49437443979).

111201010101 is a wasteful number, since it uses less digits than its factorization.

111201010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136376 (or 1136373 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 111201010101 its reverse (101010102111), we get a palindrome (212211112212).

The spelling of 111201010101 in words is "one hundred eleven billion, two hundred one million, ten thousand, one hundred one".