13212212240251 has 4 divisors (see below), whose sum is σ = 13212231197904. Its totient is φ = 13212193282600.

The previous prime is 13212212240243. The next prime is 13212212240273. The reversal of 13212212240251 is 15204221221231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13212212240251 - 2³ = 13212212240243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13212212240221) 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, 8391880 + ... + 9841141.

It is an arithmetic number, because the mean of its divisors is an integer number (3303057799476).

Almost surely, 2^{13212212240251} is an apocalyptic number.

13212212240251 is a deficient number, since it is larger than the sum of its proper divisors (18957653).

13212212240251 is an equidigital number, since it uses as much as digits as its factorization.

13212212240251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18957652.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 13212212240251 its reverse (15204221221231), we get a palindrome (28416433461482).

The spelling of 13212212240251 in words is "thirteen trillion, two hundred twelve billion, two hundred twelve million, two hundred forty thousand, two hundred fifty-one".