1223751969000 has 1280 divisors, whose sum is σ = 4834762732800. Its totient is φ = 286156800000.

The previous prime is 1223751968951. The next prime is 1223751969061. The reversal of 1223751969000 is 9691573221.

It is a happy number.

1223751969000 is a `hidden beast` number, since 1 + 2 + 2 + 375 + 196 + 90 + 0 + 0 = 666.

It is a super-2 number, since 2×1223751969000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 5077808880 + ... + 5077809120.

It is an arithmetic number, because the mean of its divisors is an integer number (3777158385).

Almost surely, 2^{1223751969000} is an apocalyptic number.

1223751969000 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 1223751969000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2417381366400).

1223751969000 is an abundant number, since it is smaller than the sum of its proper divisors (3611010763800).

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

1223751969000 is a wasteful number, since it uses less digits than its factorization.

1223751969000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 1223751969000 in words is "one trillion, two hundred twenty-three billion, seven hundred fifty-one million, nine hundred sixty-nine thousand".