1231421423245 has 32 divisors (see below), whose sum is σ = 1681093774080. Its totient is φ = 858430379520.

The previous prime is 1231421423189. The next prime is 1231421423261. The reversal of 1231421423245 is 5423241241321.

It is not a de Polignac number, because 1231421423245 - 2¹⁷ = 1231421292173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231421423245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1427169 + ... + 2121238.

It is an arithmetic number, because the mean of its divisors is an integer number (52534180440).

Almost surely, 2^{1231421423245} is an apocalyptic number.

It is an amenable number.

1231421423245 is a deficient number, since it is larger than the sum of its proper divisors (449672350835).

1231421423245 is a wasteful number, since it uses less digits than its factorization.

1231421423245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548725.

The product of its digits is 46080, while the sum is 34.

Adding to 1231421423245 its reverse (5423241241321), we get a palindrome (6654662664566).

The spelling of 1231421423245 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-one million, four hundred twenty-three thousand, two hundred forty-five".