210123032101 has 2 divisors, whose sum is σ = 210123032102. Its totient is φ = 210123032100.

The previous prime is 210123032099. The next prime is 210123032111. The reversal of 210123032101 is 101230321012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177624317025 + 32498715076 = 421455^2 + 180274^2 .

It is a cyclic number.

It is not a de Polignac number, because 210123032101 - 2¹ = 210123032099 is a prime.

Together with 210123032099, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210123032111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061516050 + 105061516051.

It is an arithmetic number, because the mean of its divisors is an integer number (105061516051).

Almost surely, 2^210123032101 is an apocalyptic number.

It is an amenable number.

210123032101 is a deficient number, since it is larger than the sum of its proper divisors (1).

210123032101 is an equidigital number, since it uses as much as digits as its factorization.

210123032101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 210123032101 its reverse (101230321012), we get a palindrome (311353353113).

It can be divided in two parts, 2 and 10123032101, that multiplied together give a palindrome (20246064202).

The spelling of 210123032101 in words is "two hundred ten billion, one hundred twenty-three million, thirty-two thousand, one hundred one".