1321351061610 has 32 divisors (see below), whose sum is σ = 3172182975360. Its totient is φ = 352255791168.

The previous prime is 1321351061599. The next prime is 1321351061617. The reversal of 1321351061610 is 161601531231.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321351061617) 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, 6427870 + ... + 6630249.

It is an arithmetic number, because the mean of its divisors is an integer number (99130717980).

Almost surely, 2^{1321351061610} is an apocalyptic number.

1321351061610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321351061610 is an abundant number, since it is smaller than the sum of its proper divisors (1850831913750).

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

1321351061610 is a wasteful number, since it uses less digits than its factorization.

1321351061610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13061502.

The product of its (nonzero) digits is 3240, while the sum is 30.

Adding to 1321351061610 its reverse (161601531231), we get a palindrome (1482952592841).

The spelling of 1321351061610 in words is "one trillion, three hundred twenty-one billion, three hundred fifty-one million, sixty-one thousand, six hundred ten".