102021113 has 2 divisors, whose sum is σ = 102021114. Its totient is φ = 102021112.

The previous prime is 102021109. The next prime is 102021133. The reversal of 102021113 is 311120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94225849 + 7795264 = 9707^2 + 2792^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021113 - 2² = 102021109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102021094 and 102021103.

It is not a weakly prime, because it can be changed into another prime (102021133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010556 + 51010557.

It is an arithmetic number, because the mean of its divisors is an integer number (51010557).

Almost surely, 2^102021113 is an apocalyptic number.

It is an amenable number.

102021113 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021113 is an equidigital number, since it uses as much as digits as its factorization.

102021113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 102021113 is about 10100.5501335323. The cubic root of 102021113 is about 467.2651081528.

Adding to 102021113 its reverse (311120201), we get a palindrome (413141314).

The spelling of 102021113 in words is "one hundred two million, twenty-one thousand, one hundred thirteen".