21233220001 has 32 divisors (see below), whose sum is σ = 24921501696. Its totient is φ = 17717400000.

The previous prime is 21233219999. The next prime is 21233220037. The reversal of 21233220001 is 10002233212.

It is a cyclic number.

It is not a de Polignac number, because 21233220001 - 2¹ = 21233219999 is a prime.

It is a super-2 number, since 2×21233220001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21233220401) 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 31 ways as a sum of consecutive naturals, for example, 10995006 + ... + 10996936.

It is an arithmetic number, because the mean of its divisors is an integer number (778796928).

Almost surely, 2^21233220001 is an apocalyptic number.

It is an amenable number.

21233220001 is a deficient number, since it is larger than the sum of its proper divisors (3688281695).

21233220001 is a wasteful number, since it uses less digits than its factorization.

21233220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21233220001 its reverse (10002233212), we get a palindrome (31235453213).

The spelling of 21233220001 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty thousand, one".