21251123110041 has 16 divisors (see below), whose sum is σ = 30944359741440. Its totient is φ = 12865453877520.

The previous prime is 21251123110001. The next prime is 21251123110057. The reversal of 21251123110041 is 14001132115212.

It is a happy number.

It is not a de Polignac number, because 21251123110041 - 2³⁷ = 21113684156569 is a prime.

It is a super-2 number, since 2×21251123110041² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21251123109993 and 21251123110020.

It is not an unprimeable number, because it can be changed into a prime (21251123110001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350336065 + ... + 350396718.

It is an arithmetic number, because the mean of its divisors is an integer number (1934022483840).

Almost surely, 2^{21251123110041} is an apocalyptic number.

It is an amenable number.

21251123110041 is a deficient number, since it is larger than the sum of its proper divisors (9693236631399).

21251123110041 is a wasteful number, since it uses less digits than its factorization.

21251123110041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700733716.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 21251123110041 its reverse (14001132115212), we get a palindrome (35252255225253).

The spelling of 21251123110041 in words is "twenty-one trillion, two hundred fifty-one billion, one hundred twenty-three million, one hundred ten thousand, forty-one".