1021101219979 has 2 divisors, whose sum is σ = 1021101219980. Its totient is φ = 1021101219978.

The previous prime is 1021101219977. The next prime is 1021101220003. The reversal of 1021101219979 is 9799121011201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021101219979 - 2¹ = 1021101219977 is a prime.

Together with 1021101219977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1021101219977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510550609989 + 510550609990.

It is an arithmetic number, because the mean of its divisors is an integer number (510550609990).

Almost surely, 2^{1021101219979} is an apocalyptic number.

1021101219979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021101219979 is an equidigital number, since it uses as much as digits as its factorization.

1021101219979 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 43.

The spelling of 1021101219979 in words is "one trillion, twenty-one billion, one hundred one million, two hundred nineteen thousand, nine hundred seventy-nine".