21101200211122 has 4 divisors (see below), whose sum is σ = 31651800316686. Its totient is φ = 10550600105560.

The previous prime is 21101200211107. The next prime is 21101200211153. The reversal of 21101200211122 is 22111200210112.

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., 14407953399961 + 6693246811161 = 3795781^2 + 2587131^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21101200211096 and 21101200211105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275300052779 + ... + 5275300052782.

Almost surely, 2^{21101200211122} is an apocalyptic number.

21101200211122 is a deficient number, since it is larger than the sum of its proper divisors (10550600105564).

21101200211122 is a wasteful number, since it uses less digits than its factorization.

21101200211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550600105563.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21101200211122 its reverse (22111200210112), we get a palindrome (43212400421234).

The spelling of 21101200211122 in words is "twenty-one trillion, one hundred one billion, two hundred million, two hundred eleven thousand, one hundred twenty-two".