2001120615842 has 16 divisors (see below), whose sum is σ = 3012061325112. Its totient is φ = 997100482560.

The previous prime is 2001120615839. The next prime is 2001120615847. The reversal of 2001120615842 is 2485160211002.

It can be written as a sum of positive squares in 4 ways, for example, as 1954205489041 + 46915126801 = 1397929^2 + 216599^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001120615799 and 2001120615808.

It is not an unprimeable number, because it can be changed into a prime (2001120615847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15688748 + ... + 15815784.

Almost surely, 2^{2001120615842} is an apocalyptic number.

2001120615842 is a deficient number, since it is larger than the sum of its proper divisors (1010940709270).

2001120615842 is a wasteful number, since it uses less digits than its factorization.

2001120615842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154213.

The product of its (nonzero) digits is 7680, while the sum is 32.

Adding to 2001120615842 its reverse (2485160211002), we get a palindrome (4486280826844).

The spelling of 2001120615842 in words is "two trillion, one billion, one hundred twenty million, six hundred fifteen thousand, eight hundred forty-two".