1209780069120 has 1728 divisors, whose sum is σ = 5263123267584. Its totient is φ = 250504151040.

The previous prime is 1209780069107. The next prime is 1209780069133. The reversal of 1209780069120 is 219600879021.

It is an interprime number because it is at equal distance from previous prime (1209780069107) and next prime (1209780069133).

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 191 ways as a sum of consecutive naturals, for example, 3047304762 + ... + 3047305158.

It is an arithmetic number, because the mean of its divisors is an integer number (3045788928).

Almost surely, 2^{1209780069120} is an apocalyptic number.

1209780069120 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 1209780069120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2631561633792).

1209780069120 is an abundant number, since it is smaller than the sum of its proper divisors (4053343198464).

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

1209780069120 is a wasteful number, since it uses less digits than its factorization.

1209780069120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 1209780069120 in words is "one trillion, two hundred nine billion, seven hundred eighty million, sixty-nine thousand, one hundred twenty".