12011665615501 has 16 divisors (see below), whose sum is σ = 12417511569408. Its totient is φ = 11606978833200.

The previous prime is 12011665615483. The next prime is 12011665615519. The reversal of 12011665615501 is 10551656611021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12011665615483) and next prime (12011665615519).

It is a cyclic number.

It is not a de Polignac number, because 12011665615501 - 2⁷ = 12011665615373 is a prime.

It is a super-3 number, since 3×12011665615501³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011665615601) 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, 67427590 + ... + 67605496.

It is an arithmetic number, because the mean of its divisors is an integer number (776094473088).

Almost surely, 2^{12011665615501} is an apocalyptic number.

It is an amenable number.

12011665615501 is a deficient number, since it is larger than the sum of its proper divisors (405845953907).

12011665615501 is a wasteful number, since it uses less digits than its factorization.

12011665615501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181152.

The product of its (nonzero) digits is 54000, while the sum is 40.

The spelling of 12011665615501 in words is "twelve trillion, eleven billion, six hundred sixty-five million, six hundred fifteen thousand, five hundred one".