212002103101021 has 2 divisors, whose sum is σ = 212002103101022. Its totient is φ = 212002103101020.

The previous prime is 212002103101007. The next prime is 212002103101031. The reversal of 212002103101021 is 120101301200212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138141588823225 + 73860514277796 = 11753365^2 + 8594214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212002103101021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212002103100986 and 212002103101004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212002103101001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106001051550510 + 106001051550511.

It is an arithmetic number, because the mean of its divisors is an integer number (106001051550511).

Almost surely, 2^{212002103101021} is an apocalyptic number.

It is an amenable number.

212002103101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212002103101021 is an equidigital number, since it uses as much as digits as its factorization.

212002103101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212002103101021 its reverse (120101301200212), we get a palindrome (332103404301233).

The spelling of 212002103101021 in words is "two hundred twelve trillion, two billion, one hundred three million, one hundred one thousand, twenty-one".