20102121220039 has 2 divisors, whose sum is σ = 20102121220040. Its totient is φ = 20102121220038.

The previous prime is 20102121220001. The next prime is 20102121220079. The reversal of 20102121220039 is 93002212120102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20102121220039 - 2¹⁷ = 20102121088967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20102121219995 and 20102121220022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102121220079) 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, 10051060610019 + 10051060610020.

It is an arithmetic number, because the mean of its divisors is an integer number (10051060610020).

Almost surely, 2^{20102121220039} is an apocalyptic number.

20102121220039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102121220039 is an equidigital number, since it uses as much as digits as its factorization.

20102121220039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 20102121220039 in words is "twenty trillion, one hundred two billion, one hundred twenty-one million, two hundred twenty thousand, thirty-nine".