11212212001021 has 4 divisors (see below), whose sum is σ = 11871753883452. Its totient is φ = 10552670118592.

The previous prime is 11212212000973. The next prime is 11212212001051. The reversal of 11212212001021 is 12010021221211.

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 10155662372025 + 1056549628996 = 3186795^2 + 1027886^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212212001021 - 2²⁵ = 11212178446589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212212000986 and 11212212001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212212001051) 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, 329770941190 + ... + 329770941223.

It is an arithmetic number, because the mean of its divisors is an integer number (2967938470863).

Almost surely, 2^{11212212001021} is an apocalyptic number.

It is an amenable number.

11212212001021 is a deficient number, since it is larger than the sum of its proper divisors (659541882431).

11212212001021 is an equidigital number, since it uses as much as digits as its factorization.

11212212001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659541882430.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11212212001021 its reverse (12010021221211), we get a palindrome (23222233222232).

The spelling of 11212212001021 in words is "eleven trillion, two hundred twelve billion, two hundred twelve million, one thousand, twenty-one".