20121022079 has 2 divisors, whose sum is σ = 20121022080. Its totient is φ = 20121022078.

The previous prime is 20121022069. The next prime is 20121022111. The reversal of 20121022079 is 97022012102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121022079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121022069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060511039 + 10060511040.

It is an arithmetic number, because the mean of its divisors is an integer number (10060511040).

Almost surely, 2^20121022079 is an apocalyptic number.

20121022079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121022079 is an equidigital number, since it uses as much as digits as its factorization.

20121022079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The spelling of 20121022079 in words is "twenty billion, one hundred twenty-one million, twenty-two thousand, seventy-nine".