11121212002001 has 4 divisors (see below), whose sum is σ = 11331046190772. Its totient is φ = 10911377813232.

The previous prime is 11121212001971. The next prime is 11121212002003. The reversal of 11121212002001 is 10020021212111.

11121212002001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3370249758976 + 7750962243025 = 1835824^2 + 2784055^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121212002001 - 2¹⁴ = 11121211985617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121212002003) 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, 104917094306 + ... + 104917094411.

It is an arithmetic number, because the mean of its divisors is an integer number (2832761547693).

Almost surely, 2^{11121212002001} is an apocalyptic number.

It is an amenable number.

11121212002001 is a deficient number, since it is larger than the sum of its proper divisors (209834188771).

11121212002001 is an equidigital number, since it uses as much as digits as its factorization.

11121212002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209834188770.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11121212002001 its reverse (10020021212111), we get a palindrome (21141233214112).

The spelling of 11121212002001 in words is "eleven trillion, one hundred twenty-one billion, two hundred twelve million, two thousand, one".