1223150121 has 6 divisors (see below), whose sum is σ = 1766772410. Its totient is φ = 815433408.

The previous prime is 1223150077. The next prime is 1223150129. The reversal of 1223150121 is 1210513221.

It can be written as a sum of positive squares in only one way, i.e., 1197506025 + 25644096 = 34605^2 + 5064^2 .

It is not a de Polignac number, because 1223150121 - 2¹⁵ = 1223117353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223150094 and 1223150103.

It is not an unprimeable number, because it can be changed into a prime (1223150129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67952776 + ... + 67952793.

Almost surely, 2^1223150121 is an apocalyptic number.

It is an amenable number.

1223150121 is a deficient number, since it is larger than the sum of its proper divisors (543622289).

1223150121 is a wasteful number, since it uses less digits than its factorization.

1223150121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135905575 (or 135905572 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1223150121 is about 34973.5631727738. The cubic root of 1223150121 is about 1069.4486113002.

Adding to 1223150121 its reverse (1210513221), we get a palindrome (2433663342).

The spelling of 1223150121 in words is "one billion, two hundred twenty-three million, one hundred fifty thousand, one hundred twenty-one".