42012421007 has 4 divisors (see below), whose sum is σ = 44223601080. Its totient is φ = 39801240936.

The previous prime is 42012420979. The next prime is 42012421013. The reversal of 42012421007 is 70012421024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42012421007 - 2¹⁶ = 42012355471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42012421037) 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 3 ways as a sum of consecutive naturals, for example, 1105590008 + ... + 1105590045.

It is an arithmetic number, because the mean of its divisors is an integer number (11055900270).

Almost surely, 2^42012421007 is an apocalyptic number.

42012421007 is a deficient number, since it is larger than the sum of its proper divisors (2211180073).

42012421007 is a wasteful number, since it uses less digits than its factorization.

42012421007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211180072.

The product of its (nonzero) digits is 896, while the sum is 23.

The spelling of 42012421007 in words is "forty-two billion, twelve million, four hundred twenty-one thousand, seven".