102123132021397 has 2 divisors, whose sum is σ = 102123132021398. Its totient is φ = 102123132021396.

The previous prime is 102123132021329. The next prime is 102123132021401. The reversal of 102123132021397 is 793120231321201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100975949645041 + 1147182376356 = 10048679^2 + 1071066^2 .

It is a cyclic number.

It is not a de Polignac number, because 102123132021397 - 2²⁷ = 102122997803669 is a prime.

It is a super-2 number, since 2×102123132021397² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102123132021997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51061566010698 + 51061566010699.

It is an arithmetic number, because the mean of its divisors is an integer number (51061566010699).

Almost surely, 2^{102123132021397} is an apocalyptic number.

It is an amenable number.

102123132021397 is a deficient number, since it is larger than the sum of its proper divisors (1).

102123132021397 is an equidigital number, since it uses as much as digits as its factorization.

102123132021397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

Adding to 102123132021397 its reverse (793120231321201), we get a palindrome (895243363342598).

The spelling of 102123132021397 in words is "one hundred two trillion, one hundred twenty-three billion, one hundred thirty-two million, twenty-one thousand, three hundred ninety-seven".