109010921 has 2 divisors, whose sum is σ = 109010922. Its totient is φ = 109010920.

The previous prime is 109010903. The next prime is 109010927. The reversal of 109010921 is 129010901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107226025 + 1784896 = 10355^2 + 1336^2 .

It is an emirp because it is prime and its reverse (129010901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109010921 - 2¹⁴ = 108994537 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (109010927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54505460 + 54505461.

It is an arithmetic number, because the mean of its divisors is an integer number (54505461).

Almost surely, 2^109010921 is an apocalyptic number.

It is an amenable number.

109010921 is a deficient number, since it is larger than the sum of its proper divisors (1).

109010921 is an equidigital number, since it uses as much as digits as its factorization.

109010921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 109010921 is about 10440.8295168535. The cubic root of 109010921 is about 477.7015711017.

The spelling of 109010921 in words is "one hundred nine million, ten thousand, nine hundred twenty-one".