1321123130201 has 32 divisors (see below), whose sum is σ = 1550708748288. Its totient is φ = 1102178911680.

The previous prime is 1321123130167. The next prime is 1321123130263. The reversal of 1321123130201 is 1020313211231.

It is a happy number.

It is not a de Polignac number, because 1321123130201 - 2¹⁰ = 1321123129177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321123130501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59679131 + ... + 59701263.

It is an arithmetic number, because the mean of its divisors is an integer number (48459648384).

Almost surely, 2^{1321123130201} is an apocalyptic number.

It is an amenable number.

1321123130201 is a deficient number, since it is larger than the sum of its proper divisors (229585618087).

1321123130201 is a wasteful number, since it uses less digits than its factorization.

1321123130201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23741.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321123130201 its reverse (1020313211231), we get a palindrome (2341436341432).

The spelling of 1321123130201 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-three million, one hundred thirty thousand, two hundred one".