102501421002391 has 2 divisors, whose sum is σ = 102501421002392. Its totient is φ = 102501421002390.

The previous prime is 102501421002367. The next prime is 102501421002457. The reversal of 102501421002391 is 193200124105201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102501421002391 - 2⁷ = 102501421002263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102501421002341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51250710501195 + 51250710501196.

It is an arithmetic number, because the mean of its divisors is an integer number (51250710501196).

Almost surely, 2^{102501421002391} is an apocalyptic number.

102501421002391 is a deficient number, since it is larger than the sum of its proper divisors (1).

102501421002391 is an equidigital number, since it uses as much as digits as its factorization.

102501421002391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 102501421002391 its reverse (193200124105201), we get a palindrome (295701545107592).

The spelling of 102501421002391 in words is "one hundred two trillion, five hundred one billion, four hundred twenty-one million, two thousand, three hundred ninety-one".