111212002121001 has 16 divisors (see below), whose sum is σ = 148637814420480. Its totient is φ = 73963801766160.

The previous prime is 111212002120931. The next prime is 111212002121039. The reversal of 111212002121001 is 100121200212111.

It is a happy number.

It is not a de Polignac number, because 111212002121001 - 2³⁴ = 111194822251817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111212002121041) 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 15 ways as a sum of consecutive naturals, for example, 6346756 + ... + 16208186.

It is an arithmetic number, because the mean of its divisors is an integer number (9289863401280).

Almost surely, 2^{111212002121001} is an apocalyptic number.

It is an amenable number.

111212002121001 is a deficient number, since it is larger than the sum of its proper divisors (37425812299479).

111212002121001 is an equidigital number, since it uses as much as digits as its factorization.

111212002121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870436.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111212002121001 its reverse (100121200212111), we get a palindrome (211333202333112).

The spelling of 111212002121001 in words is "one hundred eleven trillion, two hundred twelve billion, two million, one hundred twenty-one thousand, one".