108101221391 has 2 divisors, whose sum is σ = 108101221392. Its totient is φ = 108101221390.

The previous prime is 108101221387. The next prime is 108101221447. The reversal of 108101221391 is 193122101801.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 108101221391 - 2² = 108101221387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108101220391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54050610695 + 54050610696.

It is an arithmetic number, because the mean of its divisors is an integer number (54050610696).

Almost surely, 2^108101221391 is an apocalyptic number.

108101221391 is a deficient number, since it is larger than the sum of its proper divisors (1).

108101221391 is an equidigital number, since it uses as much as digits as its factorization.

108101221391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 108101221391 in words is "one hundred eight billion, one hundred one million, two hundred twenty-one thousand, three hundred ninety-one".