1213242113780 has 48 divisors (see below), whose sum is σ = 2673110576640. Its totient is φ = 461943043200.

The previous prime is 1213242113773. The next prime is 1213242113789. The reversal of 1213242113780 is 873112423121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213242113780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213242113789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16001870 + ... + 16077509.

It is an arithmetic number, because the mean of its divisors is an integer number (55689803680).

Almost surely, 2^{1213242113780} is an apocalyptic number.

1213242113780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213242113780 is an abundant number, since it is smaller than the sum of its proper divisors (1459868462860).

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

1213242113780 is a wasteful number, since it uses less digits than its factorization.

1213242113780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32079480 (or 32079478 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 1213242113780 in words is "one trillion, two hundred thirteen billion, two hundred forty-two million, one hundred thirteen thousand, seven hundred eighty".