1223220101 has 4 divisors (see below), whose sum is σ = 1227871392. Its totient is φ = 1218568812.

The previous prime is 1223220067. The next prime is 1223220107. The reversal of 1223220101 is 1010223221.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 1223220101 - 2²⁶ = 1156111237 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 (1223220107) 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, 2325251 + ... + 2325776.

It is an arithmetic number, because the mean of its divisors is an integer number (306967848).

Almost surely, 2^1223220101 is an apocalyptic number.

It is an amenable number.

1223220101 is a deficient number, since it is larger than the sum of its proper divisors (4651291).

1223220101 is an equidigital number, since it uses as much as digits as its factorization.

1223220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651290.

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

The square root of 1223220101 is about 34974.5636284429. The cubic root of 1223220101 is about 1069.4690063402.

Adding to 1223220101 its reverse (1010223221), we get a palindrome (2233443322).

It can be divided in two parts, 122 and 3220101, that added together give a palindrome (3220223).

The spelling of 1223220101 in words is "one billion, two hundred twenty-three million, two hundred twenty thousand, one hundred one".