1213531040442 has 32 divisors (see below), whose sum is σ = 2773846272384. Its totient is φ = 346715524800.

The previous prime is 1213531040441. The next prime is 1213531040443. The reversal of 1213531040442 is 2440401353121.

It is an interprime number because it is at equal distance from previous prime (1213531040441) and next prime (1213531040443).

It is a super-2 number, since 2×1213531040442² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213531040441) 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, 1775692 + ... + 2362232.

It is an arithmetic number, because the mean of its divisors is an integer number (86682696012).

Almost surely, 2^{1213531040442} is an apocalyptic number.

1213531040442 is an abundant number, since it is smaller than the sum of its proper divisors (1560315231942).

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

1213531040442 is a wasteful number, since it uses less digits than its factorization.

1213531040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635814.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1213531040442 its reverse (2440401353121), we get a palindrome (3653932393563).

The spelling of 1213531040442 in words is "one trillion, two hundred thirteen billion, five hundred thirty-one million, forty thousand, four hundred forty-two".