101020211111 has 2 divisors, whose sum is σ = 101020211112. Its totient is φ = 101020211110.

The previous prime is 101020211101. The next prime is 101020211129. The reversal of 101020211111 is 111112020101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101020211111 is a prime.

It is a super-2 number, since 2×101020211111² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101020211092 and 101020211101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101020211101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510105555 + 50510105556.

It is an arithmetic number, because the mean of its divisors is an integer number (50510105556).

Almost surely, 2^101020211111 is an apocalyptic number.

101020211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

101020211111 is an equidigital number, since it uses as much as digits as its factorization.

101020211111 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 101020211111 its reverse (111112020101), we get a palindrome (212132231212).

The spelling of 101020211111 in words is "one hundred one billion, twenty million, two hundred eleven thousand, one hundred eleven".