21333223011 has 4 divisors (see below), whose sum is σ = 28444297352. Its totient is φ = 14222148672.

The previous prime is 21333223003. The next prime is 21333223019. The reversal of 21333223011 is 11032233312.

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

It is an interprime number because it is at equal distance from previous prime (21333223003) and next prime (21333223019).

It is not a de Polignac number, because 21333223011 - 2³ = 21333223003 is a prime.

It is a super-2 number, since 2×21333223011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333223019) 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, 3555537166 + ... + 3555537171.

It is an arithmetic number, because the mean of its divisors is an integer number (7111074338).

Almost surely, 2^21333223011 is an apocalyptic number.

21333223011 is a deficient number, since it is larger than the sum of its proper divisors (7111074341).

21333223011 is an equidigital number, since it uses as much as digits as its factorization.

21333223011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111074340.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21333223011 its reverse (11032233312), we get a palindrome (32365456323).

The spelling of 21333223011 in words is "twenty-one billion, three hundred thirty-three million, two hundred twenty-three thousand, eleven".