1231320002 has 16 divisors (see below), whose sum is σ = 2015560800. Its totient is φ = 559503840.

The previous prime is 1231319933. The next prime is 1231320011. The reversal of 1231320002 is 2000231321.

It is a happy number.

It is a super-2 number, since 2×1231320002² = 3032297894650560008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74774 + ... + 89742.

It is an arithmetic number, because the mean of its divisors is an integer number (125972550).

Almost surely, 2^1231320002 is an apocalyptic number.

1231320002 is a deficient number, since it is larger than the sum of its proper divisors (784240798).

1231320002 is a wasteful number, since it uses less digits than its factorization.

1231320002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18721.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1231320002 is about 35090.1695920667. The cubic root of 1231320002 is about 1071.8244130483.

Adding to 1231320002 its reverse (2000231321), we get a palindrome (3231551323).

The spelling of 1231320002 in words is "one billion, two hundred thirty-one million, three hundred twenty thousand, two".