245212423221 has 8 divisors (see below), whose sum is σ = 327876102720. Its totient is φ = 163011846272.

The previous prime is 245212423207. The next prime is 245212423237. The reversal of 245212423221 is 122324212542.

245212423221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 245212423221 - 2²¹ = 245210326069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245212423321) 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 in 7 ways as a sum of consecutive naturals, for example, 115774401 + ... + 115776518.

It is an arithmetic number, because the mean of its divisors is an integer number (40984512840).

Almost surely, 2^245212423221 is an apocalyptic number.

It is an amenable number.

245212423221 is a deficient number, since it is larger than the sum of its proper divisors (82663679499).

245212423221 is a wasteful number, since it uses less digits than its factorization.

245212423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231551275.

The product of its digits is 15360, while the sum is 30.

Adding to 245212423221 its reverse (122324212542), we get a palindrome (367536635763).

The spelling of 245212423221 in words is "two hundred forty-five billion, two hundred twelve million, four hundred twenty-three thousand, two hundred twenty-one".