2181234082801 has 2 divisors, whose sum is σ = 2181234082802. Its totient is φ = 2181234082800.

The previous prime is 2181234082799. The next prime is 2181234082823. The reversal of 2181234082801 is 1082804321812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2172027488400 + 9206594401 = 1473780^2 + 95951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181234082801 - 2¹ = 2181234082799 is a prime.

Together with 2181234082799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2181234082861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090617041400 + 1090617041401.

It is an arithmetic number, because the mean of its divisors is an integer number (1090617041401).

Almost surely, 2^{2181234082801} is an apocalyptic number.

It is an amenable number.

2181234082801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181234082801 is an equidigital number, since it uses as much as digits as its factorization.

2181234082801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49152, while the sum is 40.

The spelling of 2181234082801 in words is "two trillion, one hundred eighty-one billion, two hundred thirty-four million, eighty-two thousand, eight hundred one".