21200110002122 has 4 divisors (see below), whose sum is σ = 31800165003186. Its totient is φ = 10600055001060.

The previous prime is 21200110002121. The next prime is 21200110002163. The reversal of 21200110002122 is 22120001100212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19453665818161 + 1746444183961 = 4410631^2 + 1321531^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21200110002097 and 21200110002106.

It is not an unprimeable number, because it can be changed into a prime (21200110002121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300027500529 + ... + 5300027500532.

Almost surely, 2^{21200110002122} is an apocalyptic number.

21200110002122 is a deficient number, since it is larger than the sum of its proper divisors (10600055001064).

21200110002122 is a wasteful number, since it uses less digits than its factorization.

21200110002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600055001063.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200110002122 its reverse (22120001100212), we get a palindrome (43320111102334).

The spelling of 21200110002122 in words is "twenty-one trillion, two hundred billion, one hundred ten million, two thousand, one hundred twenty-two".