221200010401 has 2 divisors, whose sum is σ = 221200010402. Its totient is φ = 221200010400.

The previous prime is 221200010393. The next prime is 221200010407. The reversal of 221200010401 is 104010002122.

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., 178029144225 + 43170866176 = 421935^2 + 207776^2 .

It is a cyclic number.

It is not a de Polignac number, because 221200010401 - 2³ = 221200010393 is a prime.

It is not a weakly prime, because it can be changed into another prime (221200010407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600005200 + 110600005201.

It is an arithmetic number, because the mean of its divisors is an integer number (110600005201).

Almost surely, 2^221200010401 is an apocalyptic number.

It is an amenable number.

221200010401 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200010401 is an equidigital number, since it uses as much as digits as its factorization.

221200010401 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 13.

Adding to 221200010401 its reverse (104010002122), we get a palindrome (325210012523).

The spelling of 221200010401 in words is "two hundred twenty-one billion, two hundred million, ten thousand, four hundred one".