1223205141 has 4 divisors (see below), whose sum is σ = 1630940192. Its totient is φ = 815470092.

The previous prime is 1223205119. The next prime is 1223205149. The reversal of 1223205141 is 1415023221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1223205141 - 2¹⁵ = 1223172373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223205149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203867521 + ... + 203867526.

It is an arithmetic number, because the mean of its divisors is an integer number (407735048).

Almost surely, 2^1223205141 is an apocalyptic number.

It is an amenable number.

1223205141 is a deficient number, since it is larger than the sum of its proper divisors (407735051).

1223205141 is an equidigital number, since it uses as much as digits as its factorization.

1223205141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407735050.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1223205141 is about 34974.3497580727. The cubic root of 1223205141 is about 1069.4646464484.

Adding to 1223205141 its reverse (1415023221), we get a palindrome (2638228362).

The spelling of 1223205141 in words is "one billion, two hundred twenty-three million, two hundred five thousand, one hundred forty-one".