1231351154201 has 4 divisors (see below), whose sum is σ = 1407258461952. Its totient is φ = 1055443846452.

The previous prime is 1231351154129. The next prime is 1231351154207. The reversal of 1231351154201 is 1024511531321.

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 a cyclic number.

It is not a de Polignac number, because 1231351154201 - 2¹⁰ = 1231351153177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231351154207) 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, 87953653865 + ... + 87953653878.

It is an arithmetic number, because the mean of its divisors is an integer number (351814615488).

Almost surely, 2^{1231351154201} is an apocalyptic number.

It is an amenable number.

1231351154201 is a deficient number, since it is larger than the sum of its proper divisors (175907307751).

1231351154201 is an equidigital number, since it uses as much as digits as its factorization.

1231351154201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175907307750.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 1231351154201 its reverse (1024511531321), we get a palindrome (2255862685522).

The spelling of 1231351154201 in words is "one trillion, two hundred thirty-one billion, three hundred fifty-one million, one hundred fifty-four thousand, two hundred one".