111210211001001 has 16 divisors (see below), whose sum is σ = 169849199590400. Its totient is φ = 63403934154768.

The previous prime is 111210211000997. The next prime is 111210211001017. The reversal of 111210211001001 is 100100112012111.

It is not a de Polignac number, because 111210211001001 - 2² = 111210211000997 is a prime.

It is a super-2 number, since 2×111210211001001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111210211001101) 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, 6031567471 + ... + 6031585908.

It is an arithmetic number, because the mean of its divisors is an integer number (10615574974400).

Almost surely, 2^{111210211001001} is an apocalyptic number.

It is an amenable number.

111210211001001 is a deficient number, since it is larger than the sum of its proper divisors (58638988589399).

111210211001001 is a wasteful number, since it uses less digits than its factorization.

111210211001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12063153828.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111210211001001 its reverse (100100112012111), we get a palindrome (211310323013112).

The spelling of 111210211001001 in words is "one hundred eleven trillion, two hundred ten billion, two hundred eleven million, one thousand, one".