100131221110087 has 2 divisors, whose sum is σ = 100131221110088. Its totient is φ = 100131221110086.

The previous prime is 100131221110079. The next prime is 100131221110093. The reversal of 100131221110087 is 780011122131001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100131221110087 - 2³ = 100131221110079 is a prime.

It is a super-2 number, since 2×100131221110087² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100131221113087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50065610555043 + 50065610555044.

It is an arithmetic number, because the mean of its divisors is an integer number (50065610555044).

Almost surely, 2^{100131221110087} is an apocalyptic number.

100131221110087 is a deficient number, since it is larger than the sum of its proper divisors (1).

100131221110087 is an equidigital number, since it uses as much as digits as its factorization.

100131221110087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 28.

Adding to 100131221110087 its reverse (780011122131001), we get a palindrome (880142343241088).

The spelling of 100131221110087 in words is "one hundred trillion, one hundred thirty-one billion, two hundred twenty-one million, one hundred ten thousand, eighty-seven".