21220002212 has 6 divisors (see below), whose sum is σ = 37135003878. Its totient is φ = 10610001104.

The previous prime is 21220002211. The next prime is 21220002247.

21220002212 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 13814711296 + 7405290916 = 117536^2 + 86054^2 .

It is not an unprimeable number, because it can be changed into a prime (21220002211) 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 as a sum of consecutive naturals, namely, 2652500273 + ... + 2652500280.

It is an arithmetic number, because the mean of its divisors is an integer number (6189167313).

Almost surely, 2^21220002212 is an apocalyptic number.

It is an amenable number.

21220002212 is a deficient number, since it is larger than the sum of its proper divisors (15915001666).

21220002212 is a wasteful number, since it uses less digits than its factorization.

21220002212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305000557 (or 5305000555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

It can be divided in two parts, 2122000 and 2212, that added together give a palindrome (2124212).

The spelling of 21220002212 in words is "twenty-one billion, two hundred twenty million, two thousand, two hundred twelve".