861200101 has 2 divisors, whose sum is σ = 861200102. Its totient is φ = 861200100.

The previous prime is 861200083. The next prime is 861200113. The reversal of 861200101 is 101002168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 749390625 + 111809476 = 27375^2 + 10574^2 .

It is a cyclic number.

It is not a de Polignac number, because 861200101 - 2⁷ = 861199973 is a prime.

It is a super-2 number, since 2×861200101² = 1483331227924820402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861200141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430600050 + 430600051.

It is an arithmetic number, because the mean of its divisors is an integer number (430600051).

Almost surely, 2^861200101 is an apocalyptic number.

It is an amenable number.

861200101 is a deficient number, since it is larger than the sum of its proper divisors (1).

861200101 is an equidigital number, since it uses as much as digits as its factorization.

861200101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 861200101 is about 29346.2110160750. The cubic root of 861200101 is about 951.4106838818.

Adding to 861200101 its reverse (101002168), we get a palindrome (962202269).

The spelling of 861200101 in words is "eight hundred sixty-one million, two hundred thousand, one hundred one".