202001100110021 has 2 divisors, whose sum is σ = 202001100110022. Its totient is φ = 202001100110020.

The previous prime is 202001100109981. The next prime is 202001100110023. The reversal of 202001100110021 is 120011001100202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197374681980100 + 4626418129921 = 14049010^2 + 2150911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202001100110021 is a prime.

Together with 202001100110023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 202001100109984 and 202001100110011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202001100110023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101000550055010 + 101000550055011.

It is an arithmetic number, because the mean of its divisors is an integer number (101000550055011).

Almost surely, 2^{202001100110021} is an apocalyptic number.

It is an amenable number.

202001100110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202001100110021 is an equidigital number, since it uses as much as digits as its factorization.

202001100110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 202001100110021 its reverse (120011001100202), we get a palindrome (322012101210223).

The spelling of 202001100110021 in words is "two hundred two trillion, one billion, one hundred million, one hundred ten thousand, twenty-one".