1321212113300 has 72 divisors (see below), whose sum is σ = 2941025220672. Its totient is φ = 514906560000.

The previous prime is 1321212113233. The next prime is 1321212113311. The reversal of 1321212113300 is 33112121231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 1341185 + ... + 2107415.

Almost surely, 2^{1321212113300} is an apocalyptic number.

1321212113300 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 1321212113300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470512610336).

1321212113300 is an abundant number, since it is smaller than the sum of its proper divisors (1619813107372).

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

1321212113300 is a wasteful number, since it uses less digits than its factorization.

1321212113300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766689 (or 766682 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321212113300 its reverse (33112121231), we get a palindrome (1354324234531).

The spelling of 1321212113300 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, one hundred thirteen thousand, three hundred".