51212123221302 has 24 divisors (see below), whose sum is σ = 111074346576336. Its totient is φ = 17053054469136.

The previous prime is 51212123221291. The next prime is 51212123221307. The reversal of 51212123221302 is 20312232121215.

51212123221302 is a `hidden beast` number, since 5 + 1 + 2 + 12 + 123 + 221 + 302 = 666.

51212123221302 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51212123221307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1471088053 + ... + 1471122864.

It is an arithmetic number, because the mean of its divisors is an integer number (4628097774014).

Almost surely, 2^{51212123221302} is an apocalyptic number.

51212123221302 is an abundant number, since it is smaller than the sum of its proper divisors (59862223355034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51212123221302 is a wasteful number, since it uses less digits than its factorization.

51212123221302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942211892 (or 2942211889 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 51212123221302 its reverse (20312232121215), we get a palindrome (71524355342517).

The spelling of 51212123221302 in words is "fifty-one trillion, two hundred twelve billion, one hundred twenty-three million, two hundred twenty-one thousand, three hundred two".