1321020232002 has 12 divisors (see below), whose sum is σ = 2862210502710. Its totient is φ = 440340077328.

The previous prime is 1321020231983. The next prime is 1321020232073. The reversal of 1321020232002 is 2002320201231.

1321020232002 is a `hidden beast` number, since 1 + 321 + 0 + 20 + 2 + 320 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1302426455121 + 18593776881 = 1141239^2 + 136359^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 73390012889 = 1321020232002 / (1 + 3 + 2 + 1 + 0 + 2 + 0 + 2 + 3 + 2 + 0 + 0 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36695006427 + ... + 36695006462.

Almost surely, 2^{1321020232002} is an apocalyptic number.

1321020232002 is an abundant number, since it is smaller than the sum of its proper divisors (1541190270708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321020232002 is a wasteful number, since it uses less digits than its factorization.

1321020232002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73390012897 (or 73390012894 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1321020232002 its reverse (2002320201231), we get a palindrome (3323340433233).

The spelling of 1321020232002 in words is "one trillion, three hundred twenty-one billion, twenty million, two hundred thirty-two thousand, two".