100101221291 has 2 divisors, whose sum is σ = 100101221292. Its totient is φ = 100101221290.

The previous prime is 100101221287. The next prime is 100101221303. The reversal of 100101221291 is 192122101001.

It is a weak prime.

It is an emirp because it is prime and its reverse (192122101001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100101221291 - 2² = 100101221287 is a prime.

It is not a weakly prime, because it can be changed into another prime (100103221291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50050610645 + 50050610646.

It is an arithmetic number, because the mean of its divisors is an integer number (50050610646).

Almost surely, 2^100101221291 is an apocalyptic number.

100101221291 is a deficient number, since it is larger than the sum of its proper divisors (1).

100101221291 is an equidigital number, since it uses as much as digits as its factorization.

100101221291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 100101221291 its reverse (192122101001), we get a palindrome (292223322292).

The spelling of 100101221291 in words is "one hundred billion, one hundred one million, two hundred twenty-one thousand, two hundred ninety-one".