221122011011001 has 4 divisors (see below), whose sum is σ = 294829348014672. Its totient is φ = 147414674007332.

The previous prime is 221122011010829. The next prime is 221122011011009. The reversal of 221122011011001 is 100110110221122.

It is a happy number.

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 221122011011001 - 2⁴⁵ = 185937638922169 is a prime.

It is a super-2 number, since 2×221122011011001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221122011011009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36853668501831 + ... + 36853668501836.

It is an arithmetic number, because the mean of its divisors is an integer number (73707337003668).

Almost surely, 2^{221122011011001} is an apocalyptic number.

It is an amenable number.

221122011011001 is a deficient number, since it is larger than the sum of its proper divisors (73707337003671).

221122011011001 is an equidigital number, since it uses as much as digits as its factorization.

221122011011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73707337003670.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221122011011001 its reverse (100110110221122), we get a palindrome (321232121232123).

The spelling of 221122011011001 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, eleven million, eleven thousand, one".