21100340201 has 2 divisors, whose sum is σ = 21100340202. Its totient is φ = 21100340200.

The previous prime is 21100340189. The next prime is 21100340213. The reversal of 21100340201 is 10204300112.

It is a balanced prime because it is at equal distance from previous prime (21100340189) and next prime (21100340213).

It can be written as a sum of positive squares in only one way, i.e., 11374435801 + 9725904400 = 106651^2 + 98620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100340201 is a prime.

It is not a weakly prime, because it can be changed into another prime (21100340221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550170100 + 10550170101.

It is an arithmetic number, because the mean of its divisors is an integer number (10550170101).

Almost surely, 2^21100340201 is an apocalyptic number.

It is an amenable number.

21100340201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100340201 is an equidigital number, since it uses as much as digits as its factorization.

21100340201 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 14.

Adding to 21100340201 its reverse (10204300112), we get a palindrome (31304640313).

The spelling of 21100340201 in words is "twenty-one billion, one hundred million, three hundred forty thousand, two hundred one".