21251223465134 has 8 divisors (see below), whose sum is σ = 34328899443720. Its totient is φ = 9808256983896.

The previous prime is 21251223465079. The next prime is 21251223465137. The reversal of 21251223465134 is 43156432215212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21251223465134² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21251223465091 and 21251223465100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21251223465137) 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, 408677374304 + ... + 408677374355.

It is an arithmetic number, because the mean of its divisors is an integer number (4291112430465).

Almost surely, 2^{21251223465134} is an apocalyptic number.

21251223465134 is a deficient number, since it is larger than the sum of its proper divisors (13077675978586).

21251223465134 is a wasteful number, since it uses less digits than its factorization.

21251223465134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817354748674.

The product of its digits is 345600, while the sum is 41.

The spelling of 21251223465134 in words is "twenty-one trillion, two hundred fifty-one billion, two hundred twenty-three million, four hundred sixty-five thousand, one hundred thirty-four".