100721686735427 has 2 divisors, whose sum is σ = 100721686735428. Its totient is φ = 100721686735426.

The previous prime is 100721686735409. The next prime is 100721686735487. The reversal of 100721686735427 is 724537686127001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100721686735427 is a prime.

It is not a weakly prime, because it can be changed into another prime (100721686735487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50360843367713 + 50360843367714.

It is an arithmetic number, because the mean of its divisors is an integer number (50360843367714).

Almost surely, 2^{100721686735427} is an apocalyptic number.

100721686735427 is a deficient number, since it is larger than the sum of its proper divisors (1).

100721686735427 is an equidigital number, since it uses as much as digits as its factorization.

100721686735427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 100721686735427 in words is "one hundred trillion, seven hundred twenty-one billion, six hundred eighty-six million, seven hundred thirty-five thousand, four hundred twenty-seven".