1234220121 has 6 divisors (see below), whose sum is σ = 1782762410. Its totient is φ = 822813408.

The previous prime is 1234220083. The next prime is 1234220123. The reversal of 1234220121 is 1210224321.

It is a happy number.

1234220121 is a `hidden beast` number, since 123 + 422 + 0 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1101509721 + 132710400 = 33189^2 + 11520^2 .

It is not a de Polignac number, because 1234220121 - 2²⁹ = 697349209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1234220094 and 1234220103.

It is not an unprimeable number, because it can be changed into a prime (1234220123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68567776 + ... + 68567793.

Almost surely, 2^1234220121 is an apocalyptic number.

It is an amenable number.

1234220121 is a deficient number, since it is larger than the sum of its proper divisors (548542289).

1234220121 is a wasteful number, since it uses less digits than its factorization.

1234220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137135575 (or 137135572 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1234220121 is about 35131.4690982316. The cubic root of 1234220121 is about 1072.6652399973.

Adding to 1234220121 its reverse (1210224321), we get a palindrome (2444444442).

The spelling of 1234220121 in words is "one billion, two hundred thirty-four million, two hundred twenty thousand, one hundred twenty-one".