102121100111 has 2 divisors, whose sum is σ = 102121100112. Its totient is φ = 102121100110.

The previous prime is 102121100093. The next prime is 102121100131. The reversal of 102121100111 is 111001121201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102121100111 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 102121100092 and 102121100101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102121100131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060550055 + 51060550056.

It is an arithmetic number, because the mean of its divisors is an integer number (51060550056).

Almost surely, 2^102121100111 is an apocalyptic number.

102121100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121100111 is an equidigital number, since it uses as much as digits as its factorization.

102121100111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 102121100111 its reverse (111001121201), we get a palindrome (213122221312).

The spelling of 102121100111 in words is "one hundred two billion, one hundred twenty-one million, one hundred thousand, one hundred eleven".