3215643123361 has 16 divisors (see below), whose sum is σ = 3295054218240. Its totient is φ = 3137300939520.

The previous prime is 3215643123349. The next prime is 3215643123373. The reversal of 3215643123361 is 1633213465123.

It is an interprime number because it is at equal distance from previous prime (3215643123349) and next prime (3215643123373).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3215643123361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3215643193361) 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, 2381865 + ... + 3479161.

It is an arithmetic number, because the mean of its divisors is an integer number (205940888640).

Almost surely, 2^{3215643123361} is an apocalyptic number.

It is an amenable number.

3215643123361 is a deficient number, since it is larger than the sum of its proper divisors (79411094879).

3215643123361 is a wasteful number, since it uses less digits than its factorization.

3215643123361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097784.

The product of its digits is 233280, while the sum is 40.

Adding to 3215643123361 its reverse (1633213465123), we get a palindrome (4848856588484).

The spelling of 3215643123361 in words is "three trillion, two hundred fifteen billion, six hundred forty-three million, one hundred twenty-three thousand, three hundred sixty-one".