350140215221 has 4 divisors (see below), whose sum is σ = 356074795200. Its totient is φ = 344205635244.

The previous prime is 350140215193. The next prime is 350140215223. The reversal of 350140215221 is 122512041053.

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 a de Polignac number, because none of the positive numbers 2^k-350140215221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350140215223) 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, 2967289901 + ... + 2967290018.

It is an arithmetic number, because the mean of its divisors is an integer number (89018698800).

Almost surely, 2^350140215221 is an apocalyptic number.

It is an amenable number.

350140215221 is a deficient number, since it is larger than the sum of its proper divisors (5934579979).

350140215221 is an equidigital number, since it uses as much as digits as its factorization.

350140215221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5934579978.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 350140215221 its reverse (122512041053), we get a palindrome (472652256274).

The spelling of 350140215221 in words is "three hundred fifty billion, one hundred forty million, two hundred fifteen thousand, two hundred twenty-one".