11233222001221 has 4 divisors (see below), whose sum is σ = 12254424001344. Its totient is φ = 10212020001100.

The previous prime is 11233222001173. The next prime is 11233222001231. The reversal of 11233222001221 is 12210022233211.

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 not a de Polignac number, because 11233222001221 - 2²¹ = 11233219904069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11233222001192 and 11233222001201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11233222001231) 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, 510601000045 + ... + 510601000066.

It is an arithmetic number, because the mean of its divisors is an integer number (3063606000336).

Almost surely, 2^{11233222001221} is an apocalyptic number.

11233222001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11233222001221 is a deficient number, since it is larger than the sum of its proper divisors (1021202000123).

11233222001221 is a wasteful number, since it uses less digits than its factorization.

11233222001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021202000122.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 11233222001221 its reverse (12210022233211), we get a palindrome (23443244234432).

The spelling of 11233222001221 in words is "eleven trillion, two hundred thirty-three billion, two hundred twenty-two million, one thousand, two hundred twenty-one".