42120401234 has 8 divisors (see below), whose sum is σ = 63223267068. Its totient is φ = 21045978880.

The previous prime is 42120401231. The next prime is 42120401317. The reversal of 42120401234 is 43210402124.

It can be written as a sum of positive squares in 2 ways, for example, as 41393937025 + 726464209 = 203455^2 + 26953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42120401234² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42120401231) 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, 7107167 + ... + 7113090.

Almost surely, 2^42120401234 is an apocalyptic number.

42120401234 is a deficient number, since it is larger than the sum of its proper divisors (21102865834).

42120401234 is a wasteful number, since it uses less digits than its factorization.

42120401234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14221740.

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

Adding to 42120401234 its reverse (43210402124), we get a palindrome (85330803358).

The spelling of 42120401234 in words is "forty-two billion, one hundred twenty million, four hundred one thousand, two hundred thirty-four".