102120401291 has 2 divisors, whose sum is σ = 102120401292. Its totient is φ = 102120401290.

The previous prime is 102120401287. The next prime is 102120401347. The reversal of 102120401291 is 192104021201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102120401291 - 2² = 102120401287 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (102120401261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060200645 + 51060200646.

It is an arithmetic number, because the mean of its divisors is an integer number (51060200646).

Almost surely, 2^102120401291 is an apocalyptic number.

102120401291 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120401291 is an equidigital number, since it uses as much as digits as its factorization.

102120401291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 102120401291 its reverse (192104021201), we get a palindrome (294224422492).

The spelling of 102120401291 in words is "one hundred two billion, one hundred twenty million, four hundred one thousand, two hundred ninety-one".