10211210202121 has 2 divisors, whose sum is σ = 10211210202122. Its totient is φ = 10211210202120.

The previous prime is 10211210202059. The next prime is 10211210202131. The reversal of 10211210202121 is 12120201211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10144097600400 + 67112601721 = 3184980^2 + 259061^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211210202121 - 2²¹ = 10211208104969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10211210202095 and 10211210202104.

It is not a weakly prime, because it can be changed into another prime (10211210202131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105605101060 + 5105605101061.

It is an arithmetic number, because the mean of its divisors is an integer number (5105605101061).

Almost surely, 2^{10211210202121} is an apocalyptic number.

It is an amenable number.

10211210202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211210202121 is an equidigital number, since it uses as much as digits as its factorization.

10211210202121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10211210202121 its reverse (12120201211201), we get a palindrome (22331411413322).

The spelling of 10211210202121 in words is "ten trillion, two hundred eleven billion, two hundred ten million, two hundred two thousand, one hundred twenty-one".