11212201001221 has 16 divisors (see below), whose sum is σ = 12348264297600. Its totient is φ = 10095668798400.

The previous prime is 11212201001207. The next prime is 11212201001263. The reversal of 11212201001221 is 12210010221211.

It is a cyclic number.

It is not a de Polignac number, because 11212201001221 - 2¹⁹ = 11212200476933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11212201001195 and 11212201001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212201001321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525795 + ... + 4975183.

It is an arithmetic number, because the mean of its divisors is an integer number (771766518600).

Almost surely, 2^{11212201001221} is an apocalyptic number.

11212201001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11212201001221 is a deficient number, since it is larger than the sum of its proper divisors (1136063296379).

11212201001221 is a wasteful number, since it uses less digits than its factorization.

11212201001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452220.

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

Adding to 11212201001221 its reverse (12210010221211), we get a palindrome (23422211222432).

The spelling of 11212201001221 in words is "eleven trillion, two hundred twelve billion, two hundred one million, one thousand, two hundred twenty-one".