100145258821 has 2 divisors, whose sum is σ = 100145258822. Its totient is φ = 100145258820.

The previous prime is 100145258797. The next prime is 100145258839. The reversal of 100145258821 is 128852541001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100127944900 + 17313921 = 316430^2 + 4161^2 .

It is a cyclic number.

It is not a de Polignac number, because 100145258821 - 2⁹ = 100145258309 is a prime.

It is a super-5 number, since 5×100145258821⁵ (a number of 56 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100145258861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50072629410 + 50072629411.

It is an arithmetic number, because the mean of its divisors is an integer number (50072629411).

Almost surely, 2^100145258821 is an apocalyptic number.

It is an amenable number.

100145258821 is a deficient number, since it is larger than the sum of its proper divisors (1).

100145258821 is an equidigital number, since it uses as much as digits as its factorization.

100145258821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25600, while the sum is 37.

Adding to 100145258821 its reverse (128852541001), we get a palindrome (228997799822).

The spelling of 100145258821 in words is "one hundred billion, one hundred forty-five million, two hundred fifty-eight thousand, eight hundred twenty-one".