102020101081 has 2 divisors, whose sum is σ = 102020101082. Its totient is φ = 102020101080.

The previous prime is 102020101049. The next prime is 102020101097. The reversal of 102020101081 is 180101020201.

It is an a-pointer prime, because the next prime (102020101097) can be obtained adding 102020101081 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99929325456 + 2090775625 = 316116^2 + 45725^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020101081 - 2⁵ = 102020101049 is a prime.

It is a super-2 number, since 2×102020101081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102020105081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010050540 + 51010050541.

It is an arithmetic number, because the mean of its divisors is an integer number (51010050541).

Almost surely, 2^102020101081 is an apocalyptic number.

It is an amenable number.

102020101081 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020101081 is an equidigital number, since it uses as much as digits as its factorization.

102020101081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102020101081 its reverse (180101020201), we get a palindrome (282121121282).

The spelling of 102020101081 in words is "one hundred two billion, twenty million, one hundred one thousand, eighty-one".