1312221121300 has 36 divisors (see below), whose sum is σ = 2856795208960. Its totient is φ = 523178701920.

The previous prime is 1312221121261. The next prime is 1312221121319. The reversal of 1312221121300 is 31211222131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21340980 + ... + 21402379.

Almost surely, 2^{1312221121300} is an apocalyptic number.

1312221121300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312221121300 is an abundant number, since it is smaller than the sum of its proper divisors (1544574087660).

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

1312221121300 is a wasteful number, since it uses less digits than its factorization.

1312221121300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42743680 (or 42743673 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1312221121300 its reverse (31211222131), we get a palindrome (1343432343431).

The spelling of 1312221121300 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred".