105073620021 has 12 divisors (see below), whose sum is σ = 154261089580. Its totient is φ = 68900734080.

The previous prime is 105073620019. The next prime is 105073620023. The reversal of 105073620021 is 120026370501.

It is a happy number.

105073620021 is a `hidden beast` number, since 10 + 5 + 0 + 7 + 3 + 620 + 0 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (105073620019) and next prime (105073620023).

It can be written as a sum of positive squares in 2 ways, for example, as 5081693796 + 99991926225 = 71286^2 + 316215^2 .

It is not a de Polignac number, because 105073620021 - 2¹ = 105073620019 is a prime.

It is a super-2 number, since 2×105073620021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105073620023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95694916 + ... + 95696013.

Almost surely, 2^105073620021 is an apocalyptic number.

It is an amenable number.

105073620021 is a deficient number, since it is larger than the sum of its proper divisors (49187469559).

105073620021 is a wasteful number, since it uses less digits than its factorization.

105073620021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191390996 (or 191390993 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

Adding to 105073620021 its reverse (120026370501), we get a palindrome (225099990522).

The spelling of 105073620021 in words is "one hundred five billion, seventy-three million, six hundred twenty thousand, twenty-one".