1321213450152 has 128 divisors (see below), whose sum is σ = 3642301440000. Its totient is φ = 397738688256.

The previous prime is 1321213450147. The next prime is 1321213450157. The reversal of 1321213450152 is 2510543121231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1321213450147) and next prime (1321213450157).

It is not an unprimeable number, because it can be changed into a prime (1321213450157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 412353 + ... + 1677039.

It is an arithmetic number, because the mean of its divisors is an integer number (28455480000).

Almost surely, 2^{1321213450152} is an apocalyptic number.

1321213450152 is a gapful number since it is divisible by the number (12) 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 1321213450152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1821150720000).

1321213450152 is an abundant number, since it is smaller than the sum of its proper divisors (2321087989848).

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

1321213450152 is a wasteful number, since it uses less digits than its factorization.

1321213450152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264823 (or 1264819 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1321213450152 its reverse (2510543121231), we get a palindrome (3831756571383).

The spelling of 1321213450152 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, four hundred fifty thousand, one hundred fifty-two".