1233122121 has 48 divisors (see below), whose sum is σ = 2238332928. Its totient is φ = 635493600.

The previous prime is 1233122113. The next prime is 1233122131. The reversal of 1233122121 is 1212213321.

It is not a de Polignac number, because 1233122121 - 2³ = 1233122113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1233122094 and 1233122103.

It is not an unprimeable number, because it can be changed into a prime (1233122131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81006 + ... + 95016.

It is an arithmetic number, because the mean of its divisors is an integer number (46631936).

Almost surely, 2^1233122121 is an apocalyptic number.

1233122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1233122121 is a deficient number, since it is larger than the sum of its proper divisors (1005210807).

1233122121 is a wasteful number, since it uses less digits than its factorization.

1233122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14162 (or 14159 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1233122121 is about 35115.8386059624. The cubic root of 1233122121 is about 1072.3470536784.

Adding to 1233122121 its reverse (1212213321), we get a palindrome (2445335442).

It can be divided in two parts, 12 and 33122121, that added together give a palindrome (33122133).

The spelling of 1233122121 in words is "one billion, two hundred thirty-three million, one hundred twenty-two thousand, one hundred twenty-one".