202120021032101 has 2 divisors, whose sum is σ = 202120021032102. Its totient is φ = 202120021032100.

The previous prime is 202120021032037. The next prime is 202120021032103. The reversal of 202120021032101 is 101230120021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187017276281476 + 15102744750625 = 13675426^2 + 3886225^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120021032101 - 2⁶ = 202120021032037 is a prime.

It is a Sophie Germain prime.

Together with 202120021032103, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202120021032101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202120021032103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060010516050 + 101060010516051.

It is an arithmetic number, because the mean of its divisors is an integer number (101060010516051).

Almost surely, 2^{202120021032101} is an apocalyptic number.

It is an amenable number.

202120021032101 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120021032101 is an equidigital number, since it uses as much as digits as its factorization.

202120021032101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 202120021032101 its reverse (101230120021202), we get a palindrome (303350141053303).

The spelling of 202120021032101 in words is "two hundred two trillion, one hundred twenty billion, twenty-one million, thirty-two thousand, one hundred one".