4021423122394 has 16 divisors (see below), whose sum is σ = 6114951953640. Its totient is φ = 1983107473920.

The previous prime is 4021423122347. The next prime is 4021423122397. The reversal of 4021423122394 is 4932213241204.

It can be written as a sum of positive squares in 4 ways, for example, as 3986463471769 + 34959650625 = 1996613^2 + 186975^2 .

It is not an unprimeable number, because it can be changed into a prime (4021423122397) 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, 4625362 + ... + 5425570.

Almost surely, 2^{4021423122394} is an apocalyptic number.

4021423122394 is a deficient number, since it is larger than the sum of its proper divisors (2093528831246).

4021423122394 is a wasteful number, since it uses less digits than its factorization.

4021423122394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834705.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 4021423122394 its reverse (4932213241204), we get a palindrome (8953636363598).

The spelling of 4021423122394 in words is "four trillion, twenty-one billion, four hundred twenty-three million, one hundred twenty-two thousand, three hundred ninety-four".