102021011111111 has 2 divisors, whose sum is σ = 102021011111112. Its totient is φ = 102021011111110.

The previous prime is 102021011110987. The next prime is 102021011111119. The reversal of 102021011111111 is 111111110120201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102021011111111 - 2³⁴ = 102003831241927 is a prime.

102021011111111 is a modest number, since divided by 11111111 gives 1020210 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021011111119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010505555555 + 51010505555556.

It is an arithmetic number, because the mean of its divisors is an integer number (51010505555556).

Almost surely, 2^{102021011111111} is an apocalyptic number.

102021011111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021011111111 is an equidigital number, since it uses as much as digits as its factorization.

102021011111111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 102021011111111 its reverse (111111110120201), we get a palindrome (213132121231312).

The spelling of 102021011111111 in words is "one hundred two trillion, twenty-one billion, eleven million, one hundred eleven thousand, one hundred eleven".