42121102024 has 8 divisors (see below), whose sum is σ = 78977066310. Its totient is φ = 21060551008.

The previous prime is 42121102019. The next prime is 42121102027. The reversal of 42121102024 is 42020112124.

It can be written as a sum of positive squares in only one way, i.e., 36538322500 + 5582779524 = 191150^2 + 74718^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 42121101992 and 42121102010.

It is not an unprimeable number, because it can be changed into a prime (42121102027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2632568869 + ... + 2632568884.

Almost surely, 2^42121102024 is an apocalyptic number.

It is an amenable number.

42121102024 is a deficient number, since it is larger than the sum of its proper divisors (36855964286).

42121102024 is a wasteful number, since it uses less digits than its factorization.

42121102024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5265137759 (or 5265137755 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 42121102024 its reverse (42020112124), we get a palindrome (84141214148).

The spelling of 42121102024 in words is "forty-two billion, one hundred twenty-one million, one hundred two thousand, twenty-four".