102120021011 has 2 divisors, whose sum is σ = 102120021012. Its totient is φ = 102120021010.

The previous prime is 102120020983. The next prime is 102120021013. The reversal of 102120021011 is 110120021201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102120021011 is a prime.

Together with 102120021013, 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 = 102120020983 and 102120021001.

It is not a weakly prime, because it can be changed into another prime (102120021013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060010505 + 51060010506.

It is an arithmetic number, because the mean of its divisors is an integer number (51060010506).

Almost surely, 2^102120021011 is an apocalyptic number.

102120021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120021011 is an equidigital number, since it uses as much as digits as its factorization.

102120021011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102120021011 its reverse (110120021201), we get a palindrome (212240042212).

The spelling of 102120021011 in words is "one hundred two billion, one hundred twenty million, twenty-one thousand, eleven".