101210131081 has 2 divisors, whose sum is σ = 101210131082. Its totient is φ = 101210131080.

The previous prime is 101210131049. The next prime is 101210131093. The reversal of 101210131081 is 180131012101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83338451856 + 17871679225 = 288684^2 + 133685^2 .

It is a cyclic number.

It is not a de Polignac number, because 101210131081 - 2⁵ = 101210131049 is a prime.

It is a super-2 number, since 2×101210131081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101210131181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605065540 + 50605065541.

It is an arithmetic number, because the mean of its divisors is an integer number (50605065541).

Almost surely, 2^101210131081 is an apocalyptic number.

It is an amenable number.

101210131081 is a deficient number, since it is larger than the sum of its proper divisors (1).

101210131081 is an equidigital number, since it uses as much as digits as its factorization.

101210131081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 101210131081 its reverse (180131012101), we get a palindrome (281341143182).

The spelling of 101210131081 in words is "one hundred one billion, two hundred ten million, one hundred thirty-one thousand, eighty-one".