3115240214221 has 4 divisors (see below), whose sum is σ = 3115255799200. Its totient is φ = 3115224629244.

The previous prime is 3115240214183. The next prime is 3115240214231. The reversal of 3115240214221 is 1224120425113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3115240214221 - 2²⁷ = 3115105996493 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 3115240214221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3115240214231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7488711 + ... + 7893748.

It is an arithmetic number, because the mean of its divisors is an integer number (778813949800).

Almost surely, 2^{3115240214221} is an apocalyptic number.

It is an amenable number.

3115240214221 is a deficient number, since it is larger than the sum of its proper divisors (15584979).

3115240214221 is a wasteful number, since it uses less digits than its factorization.

3115240214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15584978.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 3115240214221 its reverse (1224120425113), we get a palindrome (4339360639334).

The spelling of 3115240214221 in words is "three trillion, one hundred fifteen billion, two hundred forty million, two hundred fourteen thousand, two hundred twenty-one".