1321001121002 has 16 divisors (see below), whose sum is σ = 2014258231752. Its totient is φ = 649584645120.

The previous prime is 1321001120917. The next prime is 1321001121007. The reversal of 1321001121002 is 2001211001231.

It can be written as a sum of positive squares in 4 ways, for example, as 1019249757241 + 301751363761 = 1009579^2 + 549319^2 .

It is not an unprimeable number, because it can be changed into a prime (1321001121007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174938 + ... + 1634810.

Almost surely, 2^{1321001121002} is an apocalyptic number.

1321001121002 is a deficient number, since it is larger than the sum of its proper divisors (693257110750).

1321001121002 is a wasteful number, since it uses less digits than its factorization.

1321001121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467353.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1321001121002 its reverse (2001211001231), we get a palindrome (3322212122233).

The spelling of 1321001121002 in words is "one trillion, three hundred twenty-one billion, one million, one hundred twenty-one thousand, two".