102110010110021 has 2 divisors, whose sum is σ = 102110010110022. Its totient is φ = 102110010110020.

The previous prime is 102110010109969. The next prime is 102110010110023. The reversal of 102110010110021 is 120011010011201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97043954485921 + 5066055624100 = 9851089^2 + 2250790^2 .

It is a cyclic number.

It is not a de Polignac number, because 102110010110021 - 2⁶ = 102110010109957 is a prime.

Together with 102110010110023, 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 = 102110010109984 and 102110010110011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102110010110023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055005055010 + 51055005055011.

It is an arithmetic number, because the mean of its divisors is an integer number (51055005055011).

Almost surely, 2^{102110010110021} is an apocalyptic number.

It is an amenable number.

102110010110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102110010110021 is an equidigital number, since it uses as much as digits as its factorization.

102110010110021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 102110010110021 its reverse (120011010011201), we get a palindrome (222121020121222).

The spelling of 102110010110021 in words is "one hundred two trillion, one hundred ten billion, ten million, one hundred ten thousand, twenty-one".