42210021123 has 12 divisors (see below), whose sum is σ = 64556503128. Its totient is φ = 26484719040.

The previous prime is 42210021109. The next prime is 42210021131. The reversal of 42210021123 is 32112001224.

It is a happy number.

42210021123 is a `hidden beast` number, since 422 + 10 + 0 + 211 + 23 = 666.

It is not a de Polignac number, because 42210021123 - 2⁶ = 42210021059 is a prime.

It is a super-2 number, since 2×42210021123² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42210021096 and 42210021105.

It is not an unprimeable number, because it can be changed into a prime (42210021173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137941093 + ... + 137941398.

It is an arithmetic number, because the mean of its divisors is an integer number (5379708594).

Almost surely, 2^42210021123 is an apocalyptic number.

42210021123 is a deficient number, since it is larger than the sum of its proper divisors (22346482005).

42210021123 is a wasteful number, since it uses less digits than its factorization.

42210021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275882514 (or 275882511 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 42210021123 its reverse (32112001224), we get a palindrome (74322022347).

The spelling of 42210021123 in words is "forty-two billion, two hundred ten million, twenty-one thousand, one hundred twenty-three".