1212613542140 has 384 divisors, whose sum is σ = 3478799923200. Its totient is φ = 344878110720.

The previous prime is 1212613542139. The next prime is 1212613542143. The reversal of 1212613542140 is 412453162121.

It is a junction number, because it is equal to n+sod(n) for n = 1212613542097 and 1212613542106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212613542143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 301118807 + ... + 301122833.

It is an arithmetic number, because the mean of its divisors is an integer number (9059374800).

Almost surely, 2^{1212613542140} is an apocalyptic number.

1212613542140 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 1212613542140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1739399961600).

1212613542140 is an abundant number, since it is smaller than the sum of its proper divisors (2266186381060).

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

1212613542140 is a wasteful number, since it uses less digits than its factorization.

1212613542140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182 (or 4154 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 1212613542140 in words is "one trillion, two hundred twelve billion, six hundred thirteen million, five hundred forty-two thousand, one hundred forty".