21223553511 has 8 divisors (see below), whose sum is σ = 28319727744. Its totient is φ = 14138207480.

The previous prime is 21223553503. The next prime is 21223553557. The reversal of 21223553511 is 11535532212.

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 21223553511 - 2³ = 21223553503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223553501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2702475 + ... + 2710316.

It is an arithmetic number, because the mean of its divisors is an integer number (3539965968).

Almost surely, 2^21223553511 is an apocalyptic number.

21223553511 is a deficient number, since it is larger than the sum of its proper divisors (7096174233).

21223553511 is a wasteful number, since it uses less digits than its factorization.

21223553511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5414101.

The product of its digits is 9000, while the sum is 30.

The spelling of 21223553511 in words is "twenty-one billion, two hundred twenty-three million, five hundred fifty-three thousand, five hundred eleven".