10212421979 has 2 divisors, whose sum is σ = 10212421980. Its totient is φ = 10212421978.

The previous prime is 10212421969. The next prime is 10212422009. The reversal of 10212421979 is 97912421201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212421979 is a prime.

It is not a weakly prime, because it can be changed into another prime (10212421969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106210989 + 5106210990.

It is an arithmetic number, because the mean of its divisors is an integer number (5106210990).

Almost surely, 2^10212421979 is an apocalyptic number.

10212421979 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212421979 is an equidigital number, since it uses as much as digits as its factorization.

10212421979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 10212421979 in words is "ten billion, two hundred twelve million, four hundred twenty-one thousand, nine hundred seventy-nine".