109021961 has 2 divisors, whose sum is σ = 109021962. Its totient is φ = 109021960.

The previous prime is 109021949. The next prime is 109021973. The reversal of 109021961 is 169120901.

It is a balanced prime because it is at equal distance from previous prime (109021949) and next prime (109021973).

It can be written as a sum of positive squares in only one way, i.e., 89661961 + 19360000 = 9469^2 + 4400^2 .

It is an emirp because it is prime and its reverse (169120901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109021961 - 2⁶ = 109021897 is a prime.

It is a Chen prime.

It is equal to p_6250349 and since 109021961 and 6250349 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (109071961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54510980 + 54510981.

It is an arithmetic number, because the mean of its divisors is an integer number (54510981).

Almost surely, 2^109021961 is an apocalyptic number.

It is an amenable number.

109021961 is a deficient number, since it is larger than the sum of its proper divisors (1).

109021961 is an equidigital number, since it uses as much as digits as its factorization.

109021961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 109021961 is about 10441.3581970929. The cubic root of 109021961 is about 477.7176968479.

The spelling of 109021961 in words is "one hundred nine million, twenty-one thousand, nine hundred sixty-one".