102021002101 has 2 divisors, whose sum is σ = 102021002102. Its totient is φ = 102021002100.

The previous prime is 102021002099. The next prime is 102021002107. The reversal of 102021002101 is 101200120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53058819025 + 48962183076 = 230345^2 + 221274^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021002101 - 2¹ = 102021002099 is a prime.

Together with 102021002099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021002107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010501050 + 51010501051.

It is an arithmetic number, because the mean of its divisors is an integer number (51010501051).

Almost surely, 2^102021002101 is an apocalyptic number.

It is an amenable number.

102021002101 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021002101 is an equidigital number, since it uses as much as digits as its factorization.

102021002101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102021002101 its reverse (101200120201), we get a palindrome (203221122302).

The spelling of 102021002101 in words is "one hundred two billion, twenty-one million, two thousand, one hundred one".