21322212202 has 16 divisors (see below), whose sum is σ = 32350249800. Its totient is φ = 10538851840.

The previous prime is 21322212187. The next prime is 21322212211. The reversal of 21322212202 is 20221222312.

It can be written as a sum of positive squares in 4 ways, for example, as 11145236041 + 10176976161 = 105571^2 + 100881^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21322212202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925074 + ... + 947842.

Almost surely, 2^21322212202 is an apocalyptic number.

21322212202 is a deficient number, since it is larger than the sum of its proper divisors (11028037598).

21322212202 is a wasteful number, since it uses less digits than its factorization.

21322212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28121.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21322212202 its reverse (20221222312), we get a palindrome (41543434514).

It can be divided in two parts, 21 and 322212202, that added together give a palindrome (322212223).

The spelling of 21322212202 in words is "twenty-one billion, three hundred twenty-two million, two hundred twelve thousand, two hundred two".