1212321301 has 4 divisors (see below), whose sum is σ = 1213349004. Its totient is φ = 1211293600.

The previous prime is 1212321263. The next prime is 1212321347. The reversal of 1212321301 is 1031232121.

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 1057940676 + 154380625 = 32526^2 + 12425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212321301 - 2⁹ = 1212320789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212321361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512080 + ... + 514441.

It is an arithmetic number, because the mean of its divisors is an integer number (303337251).

Almost surely, 2^1212321301 is an apocalyptic number.

It is an amenable number.

1212321301 is a deficient number, since it is larger than the sum of its proper divisors (1027703).

1212321301 is a wasteful number, since it uses less digits than its factorization.

1212321301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027702.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1212321301 is about 34818.4046303101. The cubic root of 1212321301 is about 1066.2832294449.

Adding to 1212321301 its reverse (1031232121), we get a palindrome (2243553422).

The spelling of 1212321301 in words is "one billion, two hundred twelve million, three hundred twenty-one thousand, three hundred one".