2135666121447 has 8 divisors (see below), whose sum is σ = 2847563927920. Its totient is φ = 1423772864640.

The previous prime is 2135666121439. The next prime is 2135666121499. The reversal of 2135666121447 is 7441216665312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2135666121447 - 2³ = 2135666121439 is a prime.

It is a super-2 number, since 2×2135666121447² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2135666121396 and 2135666121405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135666121047) 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, 173829 + ... + 2074017.

It is an arithmetic number, because the mean of its divisors is an integer number (355945490990).

Almost surely, 2^{2135666121447} is an apocalyptic number.

2135666121447 is a deficient number, since it is larger than the sum of its proper divisors (711897806473).

2135666121447 is a wasteful number, since it uses less digits than its factorization.

2135666121447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274833.

The product of its digits is 1451520, while the sum is 48.

The spelling of 2135666121447 in words is "two trillion, one hundred thirty-five billion, six hundred sixty-six million, one hundred twenty-one thousand, four hundred forty-seven".