1231121301 has 4 divisors (see below), whose sum is σ = 1641495072. Its totient is φ = 820747532.

The previous prime is 1231121273. The next prime is 1231121329. The reversal of 1231121301 is 1031211321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1231121273) and next prime (1231121329).

It is a cyclic number.

It is not a de Polignac number, because 1231121301 - 2⁷ = 1231121173 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231121341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205186881 + ... + 205186886.

It is an arithmetic number, because the mean of its divisors is an integer number (410373768).

Almost surely, 2^1231121301 is an apocalyptic number.

It is an amenable number.

1231121301 is a deficient number, since it is larger than the sum of its proper divisors (410373771).

1231121301 is an equidigital number, since it uses as much as digits as its factorization.

1231121301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410373770.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1231121301 is about 35087.3381863030. The cubic root of 1231121301 is about 1071.7667556727.

Adding to 1231121301 its reverse (1031211321), we get a palindrome (2262332622).

The spelling of 1231121301 in words is "one billion, two hundred thirty-one million, one hundred twenty-one thousand, three hundred one".