1321201310 has 32 divisors (see below), whose sum is σ = 2793928032. Its totient is φ = 443479680.

The previous prime is 1321201303. The next prime is 1321201339. The reversal of 1321201310 is 131021231.

It is a super-2 number, since 2×1321201310² = 3491145803091432200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460529 + ... + 463388.

It is an arithmetic number, because the mean of its divisors is an integer number (87310251).

Almost surely, 2^1321201310 is an apocalyptic number.

1321201310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321201310 is an abundant number, since it is smaller than the sum of its proper divisors (1472726722).

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

1321201310 is a wasteful number, since it uses less digits than its factorization.

1321201310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923948.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1321201310 is about 36348.3329741544. The cubic root of 1321201310 is about 1097.2939849884.

Adding to 1321201310 its reverse (131021231), we get a palindrome (1452222541).

The spelling of 1321201310 in words is "one billion, three hundred twenty-one million, two hundred one thousand, three hundred ten".