100121320601 has 2 divisors, whose sum is σ = 100121320602. Its totient is φ = 100121320600.

The previous prime is 100121320511. The next prime is 100121320609. The reversal of 100121320601 is 106023121001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53508942400 + 46612378201 = 231320^2 + 215899^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121320601 - 2¹⁰ = 100121319577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100121320601.

It is not a weakly prime, because it can be changed into another prime (100121320609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060660300 + 50060660301.

It is an arithmetic number, because the mean of its divisors is an integer number (50060660301).

Almost surely, 2^100121320601 is an apocalyptic number.

It is an amenable number.

100121320601 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121320601 is an equidigital number, since it uses as much as digits as its factorization.

100121320601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 100121320601 its reverse (106023121001), we get a palindrome (206144441602).

The spelling of 100121320601 in words is "one hundred billion, one hundred twenty-one million, three hundred twenty thousand, six hundred one".