100221311501 has 2 divisors, whose sum is σ = 100221311502. Its totient is φ = 100221311500.

The previous prime is 100221311483. The next prime is 100221311527. The reversal of 100221311501 is 105113122001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73791006025 + 26430305476 = 271645^2 + 162574^2 .

It is a cyclic number.

It is not a de Polignac number, because 100221311501 - 2¹⁰ = 100221310477 is a prime.

It is a super-2 number, since 2×100221311501² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100221311501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100221311591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110655750 + 50110655751.

It is an arithmetic number, because the mean of its divisors is an integer number (50110655751).

Almost surely, 2^100221311501 is an apocalyptic number.

It is an amenable number.

100221311501 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221311501 is an equidigital number, since it uses as much as digits as its factorization.

100221311501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 100221311501 its reverse (105113122001), we get a palindrome (205334433502).

The spelling of 100221311501 in words is "one hundred billion, two hundred twenty-one million, three hundred eleven thousand, five hundred one".