21214222001 has 16 divisors (see below), whose sum is σ = 24298521600. Its totient is φ = 18143401680.

The previous prime is 21214221961. The next prime is 21214222039. The reversal of 21214222001 is 10022241212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21214222001 is a prime.

It is a super-5 number, since 5×21214222001⁵ (a number of 53 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214122001) 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 15 ways as a sum of consecutive naturals, for example, 10548086 + ... + 10550096.

It is an arithmetic number, because the mean of its divisors is an integer number (1518657600).

Almost surely, 2^21214222001 is an apocalyptic number.

It is an amenable number.

21214222001 is a deficient number, since it is larger than the sum of its proper divisors (3084299599).

21214222001 is a wasteful number, since it uses less digits than its factorization.

21214222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21214222001 its reverse (10022241212), we get a palindrome (31236463213).

The spelling of 21214222001 in words is "twenty-one billion, two hundred fourteen million, two hundred twenty-two thousand, one".