102021211201111 has 2 divisors, whose sum is σ = 102021211201112. Its totient is φ = 102021211201110.

The previous prime is 102021211201079. The next prime is 102021211201157. The reversal of 102021211201111 is 111102112120201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102021211201111 - 2⁵ = 102021211201079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021211211111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010605600555 + 51010605600556.

It is an arithmetic number, because the mean of its divisors is an integer number (51010605600556).

Almost surely, 2^{102021211201111} is an apocalyptic number.

102021211201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021211201111 is an equidigital number, since it uses as much as digits as its factorization.

102021211201111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 102021211201111 its reverse (111102112120201), we get a palindrome (213123323321312).

The spelling of 102021211201111 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, two hundred one thousand, one hundred eleven".