21212002111222 has 8 divisors (see below), whose sum is σ = 34265541872016. Its totient is φ = 9790154820552.

The previous prime is 21212002111177. The next prime is 21212002111253. The reversal of 21212002111222 is 22211120021212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21212002111222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407923117498 + ... + 407923117549.

It is an arithmetic number, because the mean of its divisors is an integer number (4283192734002).

Almost surely, 2^{21212002111222} is an apocalyptic number.

21212002111222 is a deficient number, since it is larger than the sum of its proper divisors (13053539760794).

21212002111222 is a wasteful number, since it uses less digits than its factorization.

21212002111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815846235062.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21212002111222 its reverse (22211120021212), we get a palindrome (43423122132434).

The spelling of 21212002111222 in words is "twenty-one trillion, two hundred twelve billion, two million, one hundred eleven thousand, two hundred twenty-two".