1215151021442 has 16 divisors (see below), whose sum is σ = 1924789428960. Its totient is φ = 573758875872.

The previous prime is 1215151021393. The next prime is 1215151021453. The reversal of 1215151021442 is 2441201515121.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51070628 + ... + 51094415.

It is an arithmetic number, because the mean of its divisors is an integer number (120299339310).

Almost surely, 2^{1215151021442} is an apocalyptic number.

1215151021442 is a deficient number, since it is larger than the sum of its proper divisors (709638407518).

1215151021442 is a wasteful number, since it uses less digits than its factorization.

1215151021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102165377.

The product of its (nonzero) digits is 3200, while the sum is 29.

Adding to 1215151021442 its reverse (2441201515121), we get a palindrome (3656352536563).

The spelling of 1215151021442 in words is "one trillion, two hundred fifteen billion, one hundred fifty-one million, twenty-one thousand, four hundred forty-two".