1232122021 has 4 divisors (see below), whose sum is σ = 1326900652. Its totient is φ = 1137343392.

The previous prime is 1232122019. The next prime is 1232122057. The reversal of 1232122021 is 1202212321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146748996 + 1085373025 = 12114^2 + 32945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232122021 - 2¹ = 1232122019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232121986 and 1232122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232122921) 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 3 ways as a sum of consecutive naturals, for example, 47389296 + ... + 47389321.

It is an arithmetic number, because the mean of its divisors is an integer number (331725163).

Almost surely, 2^1232122021 is an apocalyptic number.

It is an amenable number.

1232122021 is a deficient number, since it is larger than the sum of its proper divisors (94778631).

1232122021 is an equidigital number, since it uses as much as digits as its factorization.

1232122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94778630.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1232122021 is about 35101.5957044690. The cubic root of 1232122021 is about 1072.0570731128.

Adding to 1232122021 its reverse (1202212321), we get a palindrome (2434334342).

The spelling of 1232122021 in words is "one billion, two hundred thirty-two million, one hundred twenty-two thousand, twenty-one".