21210222002122 has 8 divisors (see below), whose sum is σ = 31825899379872. Its totient is φ = 10601588875500.

The previous prime is 21210222002093. The next prime is 21210222002129. The reversal of 21210222002122 is 22120022201212.

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 21210222002122.

It is not an unprimeable number, because it can be changed into a prime (21210222002129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1761055254 + ... + 1761067297.

It is an arithmetic number, because the mean of its divisors is an integer number (3978237422484).

Almost surely, 2^{21210222002122} is an apocalyptic number.

21210222002122 is a deficient number, since it is larger than the sum of its proper divisors (10615677377750).

21210222002122 is a wasteful number, since it uses less digits than its factorization.

21210222002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522125564.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21210222002122 its reverse (22120022201212), we get a palindrome (43330244203334).

The spelling of 21210222002122 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, two thousand, one hundred twenty-two".