12001203442555 has 16 divisors (see below), whose sum is σ = 14491071005184. Its totient is φ = 9541221867360.

The previous prime is 12001203442523. The next prime is 12001203442583. The reversal of 12001203442555 is 55524430210021.

It is a happy number.

It is not a de Polignac number, because 12001203442555 - 2⁵ = 12001203442523 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 12001203442555.

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, 8707012 + ... + 9990718.

It is an arithmetic number, because the mean of its divisors is an integer number (905691937824).

Almost surely, 2^{12001203442555} is an apocalyptic number.

12001203442555 is a deficient number, since it is larger than the sum of its proper divisors (2489867562629).

12001203442555 is a wasteful number, since it uses less digits than its factorization.

12001203442555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295346.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 12001203442555 its reverse (55524430210021), we get a palindrome (67525633652576).

The spelling of 12001203442555 in words is "twelve trillion, one billion, two hundred three million, four hundred forty-two thousand, five hundred fifty-five".