10212009979 has 2 divisors, whose sum is σ = 10212009980. Its totient is φ = 10212009978.

The previous prime is 10212009961. The next prime is 10212009989. The reversal of 10212009979 is 97990021201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10212009979 - 2⁵ = 10212009947 is a prime.

It is a super-2 number, since 2×10212009979² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10212009989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106004989 + 5106004990.

It is an arithmetic number, because the mean of its divisors is an integer number (5106004990).

Almost surely, 2^10212009979 is an apocalyptic number.

10212009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212009979 is an equidigital number, since it uses as much as digits as its factorization.

10212009979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 40.

The spelling of 10212009979 in words is "ten billion, two hundred twelve million, nine thousand, nine hundred seventy-nine".