1215523010042 has 16 divisors (see below), whose sum is σ = 2021644829664. Its totient is φ = 543452910000.

The previous prime is 1215523009999. The next prime is 1215523010063. The reversal of 1215523010042 is 2400103255121.

It is a junction number, because it is equal to n+sod(n) for n = 1215523009993 and 1215523010020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452876084 + ... + 452878767.

It is an arithmetic number, because the mean of its divisors is an integer number (126352801854).

Almost surely, 2^{1215523010042} is an apocalyptic number.

1215523010042 is a deficient number, since it is larger than the sum of its proper divisors (806121819622).

1215523010042 is a wasteful number, since it uses less digits than its factorization.

1215523010042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905754925.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 1215523010042 its reverse (2400103255121), we get a palindrome (3615626265163).

The spelling of 1215523010042 in words is "one trillion, two hundred fifteen billion, five hundred twenty-three million, ten thousand, forty-two".