1213001213320 has 32 divisors (see below), whose sum is σ = 2939195248920. Its totient is φ = 447877370880.

The previous prime is 1213001213297. The next prime is 1213001213339. The reversal of 1213001213320 is 233121003121.

It can be written as a sum of positive squares in 4 ways, for example, as 591013463076 + 621987750244 = 768774^2 + 788662^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166346801 + ... + 1166347840.

Almost surely, 2^{1213001213320} is an apocalyptic number.

1213001213320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213001213320 is an abundant number, since it is smaller than the sum of its proper divisors (1726194035600).

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

1213001213320 is a wasteful number, since it uses less digits than its factorization.

1213001213320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332694665 (or 2332694661 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1213001213320 its reverse (233121003121), we get a palindrome (1446122216441).

The spelling of 1213001213320 in words is "one trillion, two hundred thirteen billion, one million, two hundred thirteen thousand, three hundred twenty".