1213354460520 has 384 divisors, whose sum is σ = 4228029187200. Its totient is φ = 300887488512.

The previous prime is 1213354460519. The next prime is 1213354460531. The reversal of 1213354460520 is 250644533121.

1213354460520 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 3 + 5 + 44 + 605 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 89125234 + ... + 89138846.

It is an arithmetic number, because the mean of its divisors is an integer number (11010492675).

Almost surely, 2^{1213354460520} is an apocalyptic number.

1213354460520 is a gapful number since it is divisible by the number (10) 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 1213354460520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2114014593600).

1213354460520 is an abundant number, since it is smaller than the sum of its proper divisors (3014674726680).

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

1213354460520 is a wasteful number, since it uses less digits than its factorization.

1213354460520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13889 (or 13882 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 1213354460520 its reverse (250644533121), we get a palindrome (1463998993641).

It can be divided in two parts, 12133544 and 60520, that added together give a square (12194064 = 3492²).

The spelling of 1213354460520 in words is "one trillion, two hundred thirteen billion, three hundred fifty-four million, four hundred sixty thousand, five hundred twenty".