20102120002121 has 4 divisors (see below), whose sum is σ = 20190675597072. Its totient is φ = 20013564407172.

The previous prime is 20102120002099. The next prime is 20102120002123. The reversal of 20102120002121 is 12120002120102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20102120002121 - 2⁶ = 20102120002057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102120002096 and 20102120002105.

It is not an unprimeable number, because it can be changed into a prime (20102120002123) 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 in 3 ways as a sum of consecutive naturals, for example, 44277797135 + ... + 44277797588.

It is an arithmetic number, because the mean of its divisors is an integer number (5047668899268).

Almost surely, 2^{20102120002121} is an apocalyptic number.

It is an amenable number.

20102120002121 is a deficient number, since it is larger than the sum of its proper divisors (88555594951).

20102120002121 is an equidigital number, since it uses as much as digits as its factorization.

20102120002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88555594950.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102120002121 its reverse (12120002120102), we get a palindrome (32222122122223).

The spelling of 20102120002121 in words is "twenty trillion, one hundred two billion, one hundred twenty million, two thousand, one hundred twenty-one".