10131211109 has 2 divisors, whose sum is σ = 10131211110. Its totient is φ = 10131211108.

The previous prime is 10131211073. The next prime is 10131211127. The reversal of 10131211109 is 90111213101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8103960484 + 2027250625 = 90022^2 + 45025^2 .

It is a cyclic number.

It is not a de Polignac number, because 10131211109 - 2⁸ = 10131210853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10131211009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5065605554 + 5065605555.

It is an arithmetic number, because the mean of its divisors is an integer number (5065605555).

Almost surely, 2^10131211109 is an apocalyptic number.

It is an amenable number.

10131211109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10131211109 is an equidigital number, since it uses as much as digits as its factorization.

10131211109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 10131211109 in words is "ten billion, one hundred thirty-one million, two hundred eleven thousand, one hundred nine".