21202110002122 has 16 divisors (see below), whose sum is σ = 36475821179712. Its totient is φ = 9054281849760.

The previous prime is 21202110002081. The next prime is 21202110002131. The reversal of 21202110002122 is 22120001120212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21202110002096 and 21202110002105.

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, 2694722808 + ... + 2694730675.

It is an arithmetic number, because the mean of its divisors is an integer number (2279738823732).

Almost surely, 2^{21202110002122} is an apocalyptic number.

21202110002122 is a deficient number, since it is larger than the sum of its proper divisors (15273711177590).

21202110002122 is a wasteful number, since it uses less digits than its factorization.

21202110002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5389453773.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202110002122 its reverse (22120001120212), we get a palindrome (43322111122334).

The spelling of 21202110002122 in words is "twenty-one trillion, two hundred two billion, one hundred ten million, two thousand, one hundred twenty-two".