1321000403002 has 48 divisors (see below), whose sum is σ = 2323428053760. Its totient is φ = 561622588800.

The previous prime is 1321000402979. The next prime is 1321000403029. The reversal of 1321000403002 is 2003040001231.

It is a happy number.

It is a super-2 number, since 2×1321000403002² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39639927 + ... + 39673237.

It is an arithmetic number, because the mean of its divisors is an integer number (48404751120).

Almost surely, 2^{1321000403002} is an apocalyptic number.

1321000403002 is a deficient number, since it is larger than the sum of its proper divisors (1002427650758).

1321000403002 is a wasteful number, since it uses less digits than its factorization.

1321000403002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36547 (or 36540 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 1321000403002 its reverse (2003040001231), we get a palindrome (3324040404233).

The spelling of 1321000403002 in words is "one trillion, three hundred twenty-one billion, four hundred three thousand, two".