221121033411 has 4 divisors (see below), whose sum is σ = 294828044552. Its totient is φ = 147414022272.

The previous prime is 221121033407. The next prime is 221121033461. The reversal of 221121033411 is 114330121122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221121033411 - 2² = 221121033407 is a prime.

It is a super-2 number, since 2×221121033411² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121033461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36853505566 + ... + 36853505571.

It is an arithmetic number, because the mean of its divisors is an integer number (73707011138).

Almost surely, 2^221121033411 is an apocalyptic number.

221121033411 is a deficient number, since it is larger than the sum of its proper divisors (73707011141).

221121033411 is an equidigital number, since it uses as much as digits as its factorization.

221121033411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73707011140.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 221121033411 its reverse (114330121122), we get a palindrome (335451154533).

The spelling of 221121033411 in words is "two hundred twenty-one billion, one hundred twenty-one million, thirty-three thousand, four hundred eleven".