1321512211400 has 96 divisors (see below), whose sum is σ = 3178923321600. Its totient is φ = 510303494400.

The previous prime is 1321512211379. The next prime is 1321512211417. The reversal of 1321512211400 is 41122151231.

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, 57588329 + ... + 57611271.

It is an arithmetic number, because the mean of its divisors is an integer number (33113784600).

Almost surely, 2^{1321512211400} is an apocalyptic number.

1321512211400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321512211400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1589461660800).

1321512211400 is an abundant number, since it is smaller than the sum of its proper divisors (1857411110200).

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

1321512211400 is a wasteful number, since it uses less digits than its factorization.

1321512211400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32919 (or 32910 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1321512211400 its reverse (41122151231), we get a palindrome (1362634362631).

The spelling of 1321512211400 in words is "one trillion, three hundred twenty-one billion, five hundred twelve million, two hundred eleven thousand, four hundred".