42490918221 has 16 divisors (see below), whose sum is σ = 59171991936. Its totient is φ = 27070819776.

The previous prime is 42490918207. The next prime is 42490918303. The reversal of 42490918221 is 12281909424.

It is not a de Polignac number, because 42490918221 - 2⁵ = 42490918189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42490918321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206290 + ... + 357123.

It is an arithmetic number, because the mean of its divisors is an integer number (3698249496).

Almost surely, 2^42490918221 is an apocalyptic number.

It is an amenable number.

42490918221 is a deficient number, since it is larger than the sum of its proper divisors (16681073715).

42490918221 is a wasteful number, since it uses less digits than its factorization.

42490918221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564532.

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 42490918221 in words is "forty-two billion, four hundred ninety million, nine hundred eighteen thousand, two hundred twenty-one".