100121322391 has 2 divisors, whose sum is σ = 100121322392. Its totient is φ = 100121322390.

The previous prime is 100121322359. The next prime is 100121322443. The reversal of 100121322391 is 193223121001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100121322391 - 2⁵ = 100121322359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121322331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060661195 + 50060661196.

It is an arithmetic number, because the mean of its divisors is an integer number (50060661196).

Almost surely, 2^100121322391 is an apocalyptic number.

100121322391 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121322391 is an equidigital number, since it uses as much as digits as its factorization.

100121322391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 100121322391 its reverse (193223121001), we get a palindrome (293344443392).

The spelling of 100121322391 in words is "one hundred billion, one hundred twenty-one million, three hundred twenty-two thousand, three hundred ninety-one".