1204542111511 has 16 divisors (see below), whose sum is σ = 1241920096704. Its totient is φ = 1167421849344.

The previous prime is 1204542111499. The next prime is 1204542111523. The reversal of 1204542111511 is 1151112454021.

It is an interprime number because it is at equal distance from previous prime (1204542111499) and next prime (1204542111523).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1204542111511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1204542111511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204542111211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23314870 + ... + 23366476.

It is an arithmetic number, because the mean of its divisors is an integer number (77620006044).

Almost surely, 2^{1204542111511} is an apocalyptic number.

1204542111511 is a deficient number, since it is larger than the sum of its proper divisors (37377985193).

1204542111511 is a wasteful number, since it uses less digits than its factorization.

1204542111511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54090.

The product of its (nonzero) digits is 1600, while the sum is 28.

Adding to 1204542111511 its reverse (1151112454021), we get a palindrome (2355654565532).

The spelling of 1204542111511 in words is "one trillion, two hundred four billion, five hundred forty-two million, one hundred eleven thousand, five hundred eleven".