1231454511103 has 4 divisors (see below), whose sum is σ = 1231459237720. Its totient is φ = 1231449784488.

The previous prime is 1231454511073. The next prime is 1231454511163. The reversal of 1231454511103 is 3011154541321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1231454511103 - 2⁵ = 1231454511071 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 (1231454511163) 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, 1948200 + ... + 2501677.

It is an arithmetic number, because the mean of its divisors is an integer number (307864809430).

Almost surely, 2^{1231454511103} is an apocalyptic number.

1231454511103 is a deficient number, since it is larger than the sum of its proper divisors (4726617).

1231454511103 is an equidigital number, since it uses as much as digits as its factorization.

1231454511103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726616.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 1231454511103 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-four million, five hundred eleven thousand, one hundred three".