1240121400000 has 504 divisors, whose sum is σ = 4770874300752. Its totient is φ = 283449600000.

The previous prime is 1240121399989. The next prime is 1240121400019. The reversal of 1240121400000 is 41210421.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 29378910 + ... + 29421090.

It is an arithmetic number, because the mean of its divisors is an integer number (9466020438).

Almost surely, 2^{1240121400000} is an apocalyptic number.

1240121400000 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 1240121400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2385437150376).

1240121400000 is an abundant number, since it is smaller than the sum of its proper divisors (3530752900752).

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

1240121400000 is an frugal number, since it uses more digits than its factorization.

1240121400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42235 (or 42198 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1240121400000 its reverse (41210421), we get a palindrome (1240162610421).

The spelling of 1240121400000 in words is "one trillion, two hundred forty billion, one hundred twenty-one million, four hundred thousand".