1213343281152 has 156 divisors (see below), whose sum is σ = 3625643926320. Its totient is φ = 390500941824.

The previous prime is 1213343281097. The next prime is 1213343281159. The reversal of 1213343281152 is 2511823433121.

1213343281152 is a `hidden beast` number, since 1 + 2 + 133 + 432 + 81 + 15 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1213343281159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 501573 + ... + 1636539.

It is an arithmetic number, because the mean of its divisors is an integer number (23241307220).

Almost surely, 2^{1213343281152} is an apocalyptic number.

1213343281152 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 1213343281152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1812821963160).

1213343281152 is an abundant number, since it is smaller than the sum of its proper divisors (2412300645168).

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

1213343281152 is a wasteful number, since it uses less digits than its factorization.

1213343281152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135026 (or 1135001 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 1213343281152 in words is "one trillion, two hundred thirteen billion, three hundred forty-three million, two hundred eighty-one thousand, one hundred fifty-two".