21212022003 has 4 divisors (see below), whose sum is σ = 28282696008. Its totient is φ = 14141348000.

The previous prime is 21212021959. The next prime is 21212022019. The reversal of 21212022003 is 30022021212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21212022003 - 2⁹ = 21212021491 is a prime.

It is a super-2 number, since 2×21212022003² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21212002003) 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, 3535336998 + ... + 3535337003.

It is an arithmetic number, because the mean of its divisors is an integer number (7070674002).

Almost surely, 2^21212022003 is an apocalyptic number.

21212022003 is a deficient number, since it is larger than the sum of its proper divisors (7070674005).

21212022003 is an equidigital number, since it uses as much as digits as its factorization.

21212022003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070674004.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21212022003 its reverse (30022021212), we get a palindrome (51234043215).

The spelling of 21212022003 in words is "twenty-one billion, two hundred twelve million, twenty-two thousand, three".