21221120411 has 8 divisors (see below), whose sum is σ = 21318287664. Its totient is φ = 21124101600.

The previous prime is 21221120377. The next prime is 21221120429. The reversal of 21221120411 is 11402112212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21221120411 - 2¹⁴ = 21221104027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21221120411.

It is not an unprimeable number, because it can be changed into a prime (21221120441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254681 + ... + 327573.

It is an arithmetic number, because the mean of its divisors is an integer number (2664785958).

Almost surely, 2^21221120411 is an apocalyptic number.

21221120411 is a deficient number, since it is larger than the sum of its proper divisors (97167253).

21221120411 is a wasteful number, since it uses less digits than its factorization.

21221120411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74221.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221120411 its reverse (11402112212), we get a palindrome (32623232623).

The spelling of 21221120411 in words is "twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, four hundred eleven".