12011021000001 has 12 divisors (see below), whose sum is σ = 17352025411812. Its totient is φ = 8006067553536.

The previous prime is 12011020999907. The next prime is 12011021000087. The reversal of 12011021000001 is 10000012011021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9613416503601 + 2397604496400 = 3100551^2 + 1548420^2 .

It is not a de Polignac number, because 12011021000001 - 2¹⁵ = 12011020967233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12011021020001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106588876 + ... + 106701501.

It is an arithmetic number, because the mean of its divisors is an integer number (1446002117651).

Almost surely, 2^{12011021000001} is an apocalyptic number.

It is an amenable number.

12011021000001 is a deficient number, since it is larger than the sum of its proper divisors (5341004411811).

12011021000001 is a wasteful number, since it uses less digits than its factorization.

12011021000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213296640 (or 213296637 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12011021000001 its reverse (10000012011021), we get a palindrome (22011033011022).

The spelling of 12011021000001 in words is "twelve trillion, eleven billion, twenty-one million, one", and thus it is an aban number and an uban number.