100109003921 has 2 divisors, whose sum is σ = 100109003922. Its totient is φ = 100109003920.

The previous prime is 100109003909. The next prime is 100109003927. The reversal of 100109003921 is 129300901001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95308038400 + 4800965521 = 308720^2 + 69289^2 .

It is a cyclic number.

It is not a de Polignac number, because 100109003921 - 2⁶ = 100109003857 is a prime.

It is not a weakly prime, because it can be changed into another prime (100109003927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50054501960 + 50054501961.

It is an arithmetic number, because the mean of its divisors is an integer number (50054501961).

Almost surely, 2^100109003921 is an apocalyptic number.

It is an amenable number.

100109003921 is a deficient number, since it is larger than the sum of its proper divisors (1).

100109003921 is an equidigital number, since it uses as much as digits as its factorization.

100109003921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 26.

Adding to 100109003921 its reverse (129300901001), we get a palindrome (229409904922).

The spelling of 100109003921 in words is "one hundred billion, one hundred nine million, three thousand, nine hundred twenty-one".