4023121220042 has 16 divisors (see below), whose sum is σ = 6071661017352. Its totient is φ = 1999242247680.

The previous prime is 4023121220029. The next prime is 4023121220051. The reversal of 4023121220042 is 2400221213204.

It can be written as a sum of positive squares in 4 ways, for example, as 3430315156321 + 592806063721 = 1852111^2 + 769939^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004459 + ... + 3009182.

Almost surely, 2^{4023121220042} is an apocalyptic number.

4023121220042 is a deficient number, since it is larger than the sum of its proper divisors (2048539797310).

4023121220042 is a wasteful number, since it uses less digits than its factorization.

4023121220042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016713.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 4023121220042 its reverse (2400221213204), we get a palindrome (6423342433246).

The spelling of 4023121220042 in words is "four trillion, twenty-three billion, one hundred twenty-one million, two hundred twenty thousand, forty-two".