42121442502 has 16 divisors (see below), whose sum is σ = 93603205680. Its totient is φ = 14040480816.

The previous prime is 42121442501. The next prime is 42121442557. The reversal of 42121442502 is 20524412124.

It is a happy number.

42121442502 is a `hidden beast` number, since 4 + 2 + 12 + 144 + 2 + 502 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121442501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390013303 + ... + 390013410.

It is an arithmetic number, because the mean of its divisors is an integer number (5850200355).

Almost surely, 2^42121442502 is an apocalyptic number.

42121442502 is an abundant number, since it is smaller than the sum of its proper divisors (51481763178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42121442502 is a wasteful number, since it uses less digits than its factorization.

42121442502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780026724 (or 780026718 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 42121442502 its reverse (20524412124), we get a palindrome (62645854626).

The spelling of 42121442502 in words is "forty-two billion, one hundred twenty-one million, four hundred forty-two thousand, five hundred two".