21002212202122 has 8 divisors (see below), whose sum is σ = 31504186296000. Its totient is φ = 10500816770124.

The previous prime is 21002212202063. The next prime is 21002212202129. The reversal of 21002212202122 is 22120221220012.

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 21002212202122.

It is not an unprimeable number, because it can be changed into a prime (21002212202129) 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, 144574722 + ... + 144719917.

It is an arithmetic number, because the mean of its divisors is an integer number (3938023287000).

Almost surely, 2^{21002212202122} is an apocalyptic number.

21002212202122 is a deficient number, since it is larger than the sum of its proper divisors (10501974093878).

21002212202122 is a wasteful number, since it uses less digits than its factorization.

21002212202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289330940.

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

Adding to 21002212202122 its reverse (22120221220012), we get a palindrome (43122433422134).

The spelling of 21002212202122 in words is "twenty-one trillion, two billion, two hundred twelve million, two hundred two thousand, one hundred twenty-two".