1321321322121 has 16 divisors (see below), whose sum is σ = 1804767554304. Its totient is φ = 859623733584.

The previous prime is 1321321322081. The next prime is 1321321322137. The reversal of 1321321322121 is 1212231231231.

It is not a de Polignac number, because 1321321322121 - 2¹³ = 1321321313929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321321322091 and 1321321322100.

It is not an unprimeable number, because it can be changed into a prime (1321341322121) 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, 30696895 + ... + 30739908.

It is an arithmetic number, because the mean of its divisors is an integer number (112797972144).

Almost surely, 2^{1321321322121} is an apocalyptic number.

It is an amenable number.

1321321322121 is a deficient number, since it is larger than the sum of its proper divisors (483446232183).

1321321322121 is a wasteful number, since it uses less digits than its factorization.

1321321322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61436980.

The product of its digits is 864, while the sum is 24.

Adding to 1321321322121 its reverse (1212231231231), we get a palindrome (2533552553352).

The spelling of 1321321322121 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-one million, three hundred twenty-two thousand, one hundred twenty-one".