109357444822921 has 9 divisors (see below), whose sum is σ = 110600927465511. Its totient is φ = 108127789235664.

The previous prime is 109357444822919. The next prime is 109357444822961. The reversal of 109357444822921 is 129228444753901.

The square root of 109357444822921 is 10457411.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 20998948816521 + 88358496006400 = 4582461^2 + 9399920^2 .

It is not a de Polignac number, because 109357444822921 - 2¹ = 109357444822919 is a prime.

It is a super-2 number, since 2×109357444822921² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109357444822921.

It is not an unprimeable number, because it can be changed into a prime (109357444822961) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 930650830 + ... + 930768328.

Almost surely, 2^{109357444822921} is an apocalyptic number.

109357444822921 is the 10457411-st square number.

109357444822921 is the 5228706-th centered octagonal number.

It is an amenable number.

109357444822921 is a deficient number, since it is larger than the sum of its proper divisors (1243482642590).

109357444822921 is an frugal number, since it uses more digits than its factorization.

109357444822921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235176 (or 117588 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 109357444822921 in words is "one hundred nine trillion, three hundred fifty-seven billion, four hundred forty-four million, eight hundred twenty-two thousand, nine hundred twenty-one".