21222200001 has 16 divisors (see below), whose sum is σ = 29124139968. Its totient is φ = 13735857600.

The previous prime is 21222199993. The next prime is 21222200009. The reversal of 21222200001 is 10000222212.

It is an interprime number because it is at equal distance from previous prime (21222199993) and next prime (21222200009).

It is not a de Polignac number, because 21222200001 - 2³ = 21222199993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21222200001.

It is not an unprimeable number, because it can be changed into a prime (21222200009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156195 + ... + 258536.

It is an arithmetic number, because the mean of its divisors is an integer number (1820258748).

Almost surely, 2^21222200001 is an apocalyptic number.

It is an amenable number.

21222200001 is a deficient number, since it is larger than the sum of its proper divisors (7901939967).

21222200001 is a wasteful number, since it uses less digits than its factorization.

21222200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415232.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21222200001 its reverse (10000222212), we get a palindrome (31222422213).

The spelling of 21222200001 in words is "twenty-one billion, two hundred twenty-two million, two hundred thousand, one".