100042420142421 has 6 divisors (see below), whose sum is σ = 144505717983510. Its totient is φ = 66694946761608.

The previous prime is 100042420142317. The next prime is 100042420142449. The reversal of 100042420142421 is 124241024240001.

100042420142421 is a `hidden beast` number, since 10 + 0 + 0 + 4 + 2 + 4 + 201 + 424 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 99613773648900 + 428646493521 = 9980670^2 + 654711^2 .

It is not a de Polignac number, because 100042420142421 - 2⁷ = 100042420142293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100042420142461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5557912230126 + ... + 5557912230143.

It is an arithmetic number, because the mean of its divisors is an integer number (24084286330585).

Almost surely, 2^{100042420142421} is an apocalyptic number.

It is an amenable number.

100042420142421 is a deficient number, since it is larger than the sum of its proper divisors (44463297841089).

100042420142421 is a wasteful number, since it uses less digits than its factorization.

100042420142421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11115824460275 (or 11115824460272 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 100042420142421 its reverse (124241024240001), we get a palindrome (224283444382422).

The spelling of 100042420142421 in words is "one hundred trillion, forty-two billion, four hundred twenty million, one hundred forty-two thousand, four hundred twenty-one".