378357222221 has 4 divisors (see below), whose sum is σ = 412753333344. Its totient is φ = 343961111100.

The previous prime is 378357222163. The next prime is 378357222239. The reversal of 378357222221 is 122222753873.

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 378357222221 - 2²² = 378353027917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378357222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17198055545 + ... + 17198055566.

It is an arithmetic number, because the mean of its divisors is an integer number (103188333336).

Almost surely, 2^378357222221 is an apocalyptic number.

It is an amenable number.

378357222221 is a deficient number, since it is larger than the sum of its proper divisors (34396111123).

378357222221 is a wasteful number, since it uses less digits than its factorization.

378357222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34396111122.

The product of its digits is 564480, while the sum is 44.

The spelling of 378357222221 in words is "three hundred seventy-eight billion, three hundred fifty-seven million, two hundred twenty-two thousand, two hundred twenty-one".