101130101981 has 2 divisors, whose sum is σ = 101130101982. Its totient is φ = 101130101980.

The previous prime is 101130101953. The next prime is 101130102019. The reversal of 101130101981 is 189101031101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74183237956 + 26946864025 = 272366^2 + 164155^2 .

It is a cyclic number.

It is not a de Polignac number, because 101130101981 - 2¹⁰ = 101130100957 is a prime.

It is a super-2 number, since 2×101130101981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101130101981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101130106981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50565050990 + 50565050991.

It is an arithmetic number, because the mean of its divisors is an integer number (50565050991).

Almost surely, 2^101130101981 is an apocalyptic number.

It is an amenable number.

101130101981 is a deficient number, since it is larger than the sum of its proper divisors (1).

101130101981 is an equidigital number, since it uses as much as digits as its factorization.

101130101981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 26.

The spelling of 101130101981 in words is "one hundred one billion, one hundred thirty million, one hundred one thousand, nine hundred eighty-one".