102020138460397 has 2 divisors, whose sum is σ = 102020138460398. Its totient is φ = 102020138460396.

The previous prime is 102020138460371. The next prime is 102020138460421. The reversal of 102020138460397 is 793064831020201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85313782010116 + 16706356450281 = 9236546^2 + 4087341^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020138460397 - 2²³ = 102020130071789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020138464397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010069230198 + 51010069230199.

It is an arithmetic number, because the mean of its divisors is an integer number (51010069230199).

Almost surely, 2^{102020138460397} is an apocalyptic number.

It is an amenable number.

102020138460397 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020138460397 is an equidigital number, since it uses as much as digits as its factorization.

102020138460397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

Adding to 102020138460397 its reverse (793064831020201), we get a palindrome (895084969480598).

The spelling of 102020138460397 in words is "one hundred two trillion, twenty billion, one hundred thirty-eight million, four hundred sixty thousand, three hundred ninety-seven".