12011001100021 has 18 divisors (see below), whose sum is σ = 15357631874550. Its totient is φ = 9359221631760.

The previous prime is 12011001099949. The next prime is 12011001100031. The reversal of 12011001100021 is 12000110011021.

It can be written as a sum of positive squares in only one way, i.e., 9721680797521 + 2289320302500 = 3117961^2 + 1513050^2 .

It is not a de Polignac number, because 12011001100021 - 2⁷ = 12011001099893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011001099980 and 12011001100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011001100031) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1012896846 + ... + 1012908703.

Almost surely, 2^{12011001100021} is an apocalyptic number.

12011001100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011001100021 is a deficient number, since it is larger than the sum of its proper divisors (3346630774529).

12011001100021 is a wasteful number, since it uses less digits than its factorization.

12011001100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025805585 (or 2025805567 counting only the distinct ones).

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

Adding to 12011001100021 its reverse (12000110011021), we get a palindrome (24011111111042).

It can be divided in two parts, 120110011000 and 21, that added together give a palindrome (120110011021).

The spelling of 12011001100021 in words is "twelve trillion, eleven billion, one million, one hundred thousand, twenty-one".