221201153 has 2 divisors, whose sum is σ = 221201154. Its totient is φ = 221201152.

The previous prime is 221201137. The next prime is 221201179. The reversal of 221201153 is 351102122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142754704 + 78446449 = 11948^2 + 8857^2 .

It is a cyclic number.

It is not a de Polignac number, because 221201153 - 2⁴ = 221201137 is a prime.

It is not a weakly prime, because it can be changed into another prime (221201653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600576 + 110600577.

It is an arithmetic number, because the mean of its divisors is an integer number (110600577).

Almost surely, 2^221201153 is an apocalyptic number.

It is an amenable number.

221201153 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201153 is an equidigital number, since it uses as much as digits as its factorization.

221201153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 221201153 is about 14872.8327160632. The cubic root of 221201153 is about 604.7777368106. Note that the first 4 decimals are identical.

Adding to 221201153 its reverse (351102122), we get a palindrome (572303275).

The spelling of 221201153 in words is "two hundred twenty-one million, two hundred one thousand, one hundred fifty-three".