1228999353120 has 1920 divisors, whose sum is σ = 5804349788160. Its totient is φ = 237176709120.

The previous prime is 1228999353103. The next prime is 1228999353137. The reversal of 1228999353120 is 213539998221.

1228999353120 is a `hidden beast` number, since 1 + 2 + 2 + 89 + 9 + 9 + 3 + 531 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1228999353103) and next prime (1228999353137).

It is a super-3 number, since 3×1228999353120³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 1004904829 + ... + 1004906051.

It is an arithmetic number, because the mean of its divisors is an integer number (3023098848).

Almost surely, 2^{1228999353120} is an apocalyptic number.

1228999353120 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 1228999353120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2902174894080).

1228999353120 is an abundant number, since it is smaller than the sum of its proper divisors (4575350435040).

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

1228999353120 is a wasteful number, since it uses less digits than its factorization.

1228999353120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 1323 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 1228999353120 in words is "one trillion, two hundred twenty-eight billion, nine hundred ninety-nine million, three hundred fifty-three thousand, one hundred twenty".