20512102601 has 2 divisors, whose sum is σ = 20512102602. Its totient is φ = 20512102600.

The previous prime is 20512102571. The next prime is 20512102603. The reversal of 20512102601 is 10620121502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19411455625 + 1100646976 = 139325^2 + 33176^2 .

It is a cyclic number.

It is not a de Polignac number, because 20512102601 - 2¹⁸ = 20511840457 is a prime.

It is a super-2 number, since 2×20512102601² (a number of 21 digits) contains 22 as substring.

Together with 20512102603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20512102603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256051300 + 10256051301.

It is an arithmetic number, because the mean of its divisors is an integer number (10256051301).

Almost surely, 2^20512102601 is an apocalyptic number.

It is an amenable number.

20512102601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512102601 is an equidigital number, since it uses as much as digits as its factorization.

20512102601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 20512102601 in words is "twenty billion, five hundred twelve million, one hundred two thousand, six hundred one".