202124111102021 has 2 divisors, whose sum is σ = 202124111102022. Its totient is φ = 202124111102020.

The previous prime is 202124111101993. The next prime is 202124111102041. The reversal of 202124111102021 is 120201111421202.

It is an a-pointer prime, because the next prime (202124111102041) can be obtained adding 202124111102021 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198908853285025 + 3215257816996 = 14103505^2 + 1793114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202124111102021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202124111101984 and 202124111102002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202124111102041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101062055551010 + 101062055551011.

It is an arithmetic number, because the mean of its divisors is an integer number (101062055551011).

Almost surely, 2^{202124111102021} is an apocalyptic number.

It is an amenable number.

202124111102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202124111102021 is an equidigital number, since it uses as much as digits as its factorization.

202124111102021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 202124111102021 its reverse (120201111421202), we get a palindrome (322325222523223).

The spelling of 202124111102021 in words is "two hundred two trillion, one hundred twenty-four billion, one hundred eleven million, one hundred two thousand, twenty-one".