12011021002001 has 4 divisors (see below), whose sum is σ = 13726881145152. Its totient is φ = 10295160858852.

The previous prime is 12011021001989. The next prime is 12011021002091. The reversal of 12011021002001 is 10020012011021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011021002001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12011021002091) 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, 857930071565 + ... + 857930071578.

It is an arithmetic number, because the mean of its divisors is an integer number (3431720286288).

Almost surely, 2^{12011021002001} is an apocalyptic number.

It is an amenable number.

12011021002001 is a deficient number, since it is larger than the sum of its proper divisors (1715860143151).

12011021002001 is an equidigital number, since it uses as much as digits as its factorization.

12011021002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715860143150.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12011021002001 its reverse (10020012011021), we get a palindrome (22031033013022).

The spelling of 12011021002001 in words is "twelve trillion, eleven billion, twenty-one million, two thousand, one".