101200002181 has 2 divisors, whose sum is σ = 101200002182. Its totient is φ = 101200002180.

The previous prime is 101200002161. The next prime is 101200002209. The reversal of 101200002181 is 181200002101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97035365025 + 4164637156 = 311505^2 + 64534^2 .

It is a cyclic number.

It is not a de Polignac number, because 101200002181 - 2⁵ = 101200002149 is a prime.

It is a super-2 number, since 2×101200002181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101200002161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50600001090 + 50600001091.

It is an arithmetic number, because the mean of its divisors is an integer number (50600001091).

Almost surely, 2^101200002181 is an apocalyptic number.

It is an amenable number.

101200002181 is a deficient number, since it is larger than the sum of its proper divisors (1).

101200002181 is an equidigital number, since it uses as much as digits as its factorization.

101200002181 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 101200002181 its reverse (181200002101), we get a palindrome (282400004282).

The spelling of 101200002181 in words is "one hundred one billion, two hundred million, two thousand, one hundred eighty-one".