221200132001 has 2 divisors, whose sum is σ = 221200132002. Its totient is φ = 221200132000.

The previous prime is 221200131967. The next prime is 221200132003. The reversal of 221200132001 is 100231002122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135379843600 + 85820288401 = 367940^2 + 292951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200132001 is a prime.

It is a Sophie Germain prime.

Together with 221200132003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (221200132003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600066000 + 110600066001.

It is an arithmetic number, because the mean of its divisors is an integer number (110600066001).

Almost surely, 2^221200132001 is an apocalyptic number.

It is an amenable number.

221200132001 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200132001 is an equidigital number, since it uses as much as digits as its factorization.

221200132001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 221200132001 its reverse (100231002122), we get a palindrome (321431134123).

The spelling of 221200132001 in words is "two hundred twenty-one billion, two hundred million, one hundred thirty-two thousand, one".