1232120309 has 16 divisors (see below), whose sum is σ = 1452028032. Its totient is φ = 1023667008.

The previous prime is 1232120293. The next prime is 1232120333. The reversal of 1232120309 is 9030212321.

It is not a de Polignac number, because 1232120309 - 2⁴ = 1232120293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232120399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10787 + ... + 50799.

It is an arithmetic number, because the mean of its divisors is an integer number (90751752).

Almost surely, 2^1232120309 is an apocalyptic number.

It is an amenable number.

1232120309 is a deficient number, since it is larger than the sum of its proper divisors (219907723).

1232120309 is an equidigital number, since it uses as much as digits as its factorization.

1232120309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40156.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1232120309 is about 35101.5713181048. The cubic root of 1232120309 is about 1072.0565765812.

The spelling of 1232120309 in words is "one billion, two hundred thirty-two million, one hundred twenty thousand, three hundred nine".