1212331013442 has 128 divisors (see below), whose sum is σ = 2958090969600. Its totient is φ = 366465835008.

The previous prime is 1212331013429. The next prime is 1212331013477. The reversal of 1212331013442 is 2443101332121.

1212331013442 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 3 + 310 + 1 + 344 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3325234 + ... + 3671762.

It is an arithmetic number, because the mean of its divisors is an integer number (23110085700).

Almost surely, 2^{1212331013442} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212331013442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1479045484800).

1212331013442 is an abundant number, since it is smaller than the sum of its proper divisors (1745759956158).

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

1212331013442 is a wasteful number, since it uses less digits than its factorization.

1212331013442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346697 (or 346691 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 1212331013442 its reverse (2443101332121), we get a palindrome (3655432345563).

The spelling of 1212331013442 in words is "one trillion, two hundred twelve billion, three hundred thirty-one million, thirteen thousand, four hundred forty-two".