10212100649 has 2 divisors, whose sum is σ = 10212100650. Its totient is φ = 10212100648.

The previous prime is 10212100621. The next prime is 10212100667. The reversal of 10212100649 is 94600121201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9157150249 + 1054950400 = 95693^2 + 32480^2 .

It is an emirp because it is prime and its reverse (94600121201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10212100649 - 2²⁰ = 10211052073 is a prime.

It is not a weakly prime, because it can be changed into another prime (10212100669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106050324 + 5106050325.

It is an arithmetic number, because the mean of its divisors is an integer number (5106050325).

Almost surely, 2^10212100649 is an apocalyptic number.

It is an amenable number.

10212100649 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212100649 is an equidigital number, since it uses as much as digits as its factorization.

10212100649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 10212100649 in words is "ten billion, two hundred twelve million, one hundred thousand, six hundred forty-nine".