105210625021 has 2 divisors, whose sum is σ = 105210625022. Its totient is φ = 105210625020.

The previous prime is 105210625001. The next prime is 105210625067. The reversal of 105210625021 is 120526012501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68859008100 + 36351616921 = 262410^2 + 190661^2 .

It is a cyclic number.

It is not a de Polignac number, because 105210625021 - 2¹¹ = 105210622973 is a prime.

It is a super-2 number, since 2×105210625021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105210625001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52605312510 + 52605312511.

It is an arithmetic number, because the mean of its divisors is an integer number (52605312511).

Almost surely, 2^105210625021 is an apocalyptic number.

It is an amenable number.

105210625021 is a deficient number, since it is larger than the sum of its proper divisors (1).

105210625021 is an equidigital number, since it uses as much as digits as its factorization.

105210625021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 105210625021 its reverse (120526012501), we get a palindrome (225736637522).

The spelling of 105210625021 in words is "one hundred five billion, two hundred ten million, six hundred twenty-five thousand, twenty-one".