1200320440042 has 32 divisors (see below), whose sum is σ = 1869629299200. Its totient is φ = 577657928448.

The previous prime is 1200320439973. The next prime is 1200320440079. The reversal of 1200320440042 is 2400440230021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1200320439995 and 1200320440022.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671559 + ... + 1688677.

It is an arithmetic number, because the mean of its divisors is an integer number (58425915600).

Almost surely, 2^{1200320440042} is an apocalyptic number.

1200320440042 is a deficient number, since it is larger than the sum of its proper divisors (669308859158).

1200320440042 is a wasteful number, since it uses less digits than its factorization.

1200320440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017390.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 1200320440042 its reverse (2400440230021), we get a palindrome (3600760670063).

The spelling of 1200320440042 in words is "one trillion, two hundred billion, three hundred twenty million, four hundred forty thousand, forty-two".