13321212202157 has 2 divisors, whose sum is σ = 13321212202158. Its totient is φ = 13321212202156.

The previous prime is 13321212202153. The next prime is 13321212202169. The reversal of 13321212202157 is 75120221212331.

13321212202157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13214635417636 + 106576784521 = 3635194^2 + 326461^2 .

It is a cyclic number.

It is not a de Polignac number, because 13321212202157 - 2² = 13321212202153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13321212202153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660606101078 + 6660606101079.

It is an arithmetic number, because the mean of its divisors is an integer number (6660606101079).

Almost surely, 2^{13321212202157} is an apocalyptic number.

It is an amenable number.

13321212202157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13321212202157 is an equidigital number, since it uses as much as digits as its factorization.

13321212202157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 13321212202157 its reverse (75120221212331), we get a palindrome (88441433414488).

The spelling of 13321212202157 in words is "thirteen trillion, three hundred twenty-one billion, two hundred twelve million, two hundred two thousand, one hundred fifty-seven".