109941590021 has 2 divisors, whose sum is σ = 109941590022. Its totient is φ = 109941590020.

The previous prime is 109941589991. The next prime is 109941590027. The reversal of 109941590021 is 120095149901.

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., 70623062500 + 39318527521 = 265750^2 + 198289^2 .

It is a cyclic number.

It is not a de Polignac number, because 109941590021 - 2⁶ = 109941589957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109941590027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54970795010 + 54970795011.

It is an arithmetic number, because the mean of its divisors is an integer number (54970795011).

Almost surely, 2^109941590021 is an apocalyptic number.

It is an amenable number.

109941590021 is a deficient number, since it is larger than the sum of its proper divisors (1).

109941590021 is an equidigital number, since it uses as much as digits as its factorization.

109941590021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 41.

The spelling of 109941590021 in words is "one hundred nine billion, nine hundred forty-one million, five hundred ninety thousand, twenty-one".