111000212001001 has 4 divisors (see below), whose sum is σ = 117529636236372. Its totient is φ = 104470787765632.

The previous prime is 111000212000983. The next prime is 111000212001047. The reversal of 111000212001001 is 100100212000111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85553231751001 + 25446980250000 = 9249499^2 + 5044500^2 .

It is a cyclic number.

It is not a de Polignac number, because 111000212001001 - 2¹¹ = 111000211998953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111000212001401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3264712117660 + ... + 3264712117693.

It is an arithmetic number, because the mean of its divisors is an integer number (29382409059093).

Almost surely, 2^{111000212001001} is an apocalyptic number.

It is an amenable number.

111000212001001 is a deficient number, since it is larger than the sum of its proper divisors (6529424235371).

111000212001001 is an equidigital number, since it uses as much as digits as its factorization.

111000212001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6529424235370.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111000212001001 its reverse (100100212000111), we get a palindrome (211100424001112).

The spelling of 111000212001001 in words is "one hundred eleven trillion, two hundred twelve million, one thousand, one".