100426005221 has 2 divisors, whose sum is σ = 100426005222. Its totient is φ = 100426005220.

The previous prime is 100426005217. The next prime is 100426005223. The reversal of 100426005221 is 122500624001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55062969025 + 45363036196 = 234655^2 + 212986^2 .

It is a cyclic number.

It is not a de Polignac number, because 100426005221 - 2² = 100426005217 is a prime.

Together with 100426005223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100426005223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50213002610 + 50213002611.

It is an arithmetic number, because the mean of its divisors is an integer number (50213002611).

Almost surely, 2^100426005221 is an apocalyptic number.

It is an amenable number.

100426005221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100426005221 is an equidigital number, since it uses as much as digits as its factorization.

100426005221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 100426005221 its reverse (122500624001), we get a palindrome (222926629222).

The spelling of 100426005221 in words is "one hundred billion, four hundred twenty-six million, five thousand, two hundred twenty-one".