1213422521320 has 16 divisors (see below), whose sum is σ = 2730200673060. Its totient is φ = 485369008512.

The previous prime is 1213422521279. The next prime is 1213422521369. The reversal of 1213422521320 is 231252243121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1126455331716 + 86967189604 = 1061346^2 + 294902^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15167781477 + ... + 15167781556.

Almost surely, 2^{1213422521320} is an apocalyptic number.

1213422521320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213422521320 is an abundant number, since it is smaller than the sum of its proper divisors (1516778151740).

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

1213422521320 is a wasteful number, since it uses less digits than its factorization.

1213422521320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30335563044 (or 30335563040 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1213422521320 its reverse (231252243121), we get a palindrome (1444674764441).

The spelling of 1213422521320 in words is "one trillion, two hundred thirteen billion, four hundred twenty-two million, five hundred twenty-one thousand, three hundred twenty".