1321421542002 has 12 divisors (see below), whose sum is σ = 2863080007710. Its totient is φ = 440473847328.

The previous prime is 1321421541991. The next prime is 1321421542003. The reversal of 1321421542002 is 2002451241231.

1321421542002 is a `hidden beast` number, since 1 + 3 + 21 + 4 + 215 + 420 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1237987797201 + 83433744801 = 1112649^2 + 288849^2 .

It is not an unprimeable number, because it can be changed into a prime (1321421542003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36706153927 + ... + 36706153962.

Almost surely, 2^{1321421542002} is an apocalyptic number.

1321421542002 is an abundant number, since it is smaller than the sum of its proper divisors (1541658465708).

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

1321421542002 is a wasteful number, since it uses less digits than its factorization.

1321421542002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73412307897 (or 73412307894 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 1321421542002 its reverse (2002451241231), we get a palindrome (3323872783233).

The spelling of 1321421542002 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, five hundred forty-two thousand, two".