1213121302320 has 80 divisors (see below), whose sum is σ = 3777540221952. Its totient is φ = 322048331520.

The previous prime is 1213121302301. The next prime is 1213121302331. The reversal of 1213121302320 is 232031213121.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11279826 + ... + 11386865.

Almost surely, 2^{1213121302320} is an apocalyptic number.

1213121302320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213121302320 is an abundant number, since it is smaller than the sum of its proper divisors (2564418919632).

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

1213121302320 is a wasteful number, since it uses less digits than its factorization.

1213121302320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22666930 (or 22666924 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1213121302320 its reverse (232031213121), we get a palindrome (1445152515441).

The spelling of 1213121302320 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, three hundred two thousand, three hundred twenty".