1213120042530 has 64 divisors (see below), whose sum is σ = 3207616142976. Its totient is φ = 291177920000.

The previous prime is 1213120042493. The next prime is 1213120042577. The reversal of 1213120042530 is 352400213121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213120042530.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18165291 + ... + 18231950.

It is an arithmetic number, because the mean of its divisors is an integer number (50119002234).

Almost surely, 2^{1213120042530} is an apocalyptic number.

1213120042530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213120042530 is an abundant number, since it is smaller than the sum of its proper divisors (1994496100446).

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

1213120042530 is a wasteful number, since it uses less digits than its factorization.

1213120042530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36397363.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 1213120042530 its reverse (352400213121), we get a palindrome (1565520255651).

The spelling of 1213120042530 in words is "one trillion, two hundred thirteen billion, one hundred twenty million, forty-two thousand, five hundred thirty".