1321201002 has 32 divisors (see below), whose sum is σ = 3052188864. Its totient is φ = 376812800.

The previous prime is 1321200953. The next prime is 1321201003. The reversal of 1321201002 is 2001021231.

It is a super-3 number, since 3×1321201002³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321201003) 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, 587649 + ... + 589892.

It is an arithmetic number, because the mean of its divisors is an integer number (95380902).

Almost surely, 2^1321201002 is an apocalyptic number.

1321201002 is an abundant number, since it is smaller than the sum of its proper divisors (1730987862).

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

1321201002 is a wasteful number, since it uses less digits than its factorization.

1321201002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177574.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1321201002 is about 36348.3287373711. The cubic root of 1321201002 is about 1097.2938997209.

Adding to 1321201002 its reverse (2001021231), we get a palindrome (3322222233).

The spelling of 1321201002 in words is "one billion, three hundred twenty-one million, two hundred one thousand, two".