100145402261 has 2 divisors, whose sum is σ = 100145402262. Its totient is φ = 100145402260.

The previous prime is 100145402251. The next prime is 100145402281. The reversal of 100145402261 is 162204541001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71345615236 + 28799787025 = 267106^2 + 169705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100145402261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100145402261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100145402251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50072701130 + 50072701131.

It is an arithmetic number, because the mean of its divisors is an integer number (50072701131).

Almost surely, 2^100145402261 is an apocalyptic number.

It is an amenable number.

100145402261 is a deficient number, since it is larger than the sum of its proper divisors (1).

100145402261 is an equidigital number, since it uses as much as digits as its factorization.

100145402261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 100145402261 its reverse (162204541001), we get a palindrome (262349943262).

The spelling of 100145402261 in words is "one hundred billion, one hundred forty-five million, four hundred two thousand, two hundred sixty-one".