1321231230129 has 16 divisors (see below), whose sum is σ = 1784019640320. Its totient is φ = 869632804560.

The previous prime is 1321231230107. The next prime is 1321231230157. The reversal of 1321231230129 is 9210321321231.

It is not a de Polignac number, because 1321231230129 - 2⁸ = 1321231229873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321231230096 and 1321231230105.

It is not an unprimeable number, because it can be changed into a prime (1321231230199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5873134 + ... + 6093944.

It is an arithmetic number, because the mean of its divisors is an integer number (111501227520).

Almost surely, 2^{1321231230129} is an apocalyptic number.

It is an amenable number.

1321231230129 is a deficient number, since it is larger than the sum of its proper divisors (462788410191).

1321231230129 is a wasteful number, since it uses less digits than its factorization.

1321231230129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246140.

The product of its (nonzero) digits is 3888, while the sum is 30.

The spelling of 1321231230129 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-one million, two hundred thirty thousand, one hundred twenty-nine".