101121020111 has 2 divisors, whose sum is σ = 101121020112. Its totient is φ = 101121020110.

The previous prime is 101121020081. The next prime is 101121020113. The reversal of 101121020111 is 111020121101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101121020111 is a prime.

Together with 101121020113, 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 = 101121020092 and 101121020101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101121020113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50560510055 + 50560510056.

It is an arithmetic number, because the mean of its divisors is an integer number (50560510056).

Almost surely, 2^101121020111 is an apocalyptic number.

101121020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

101121020111 is an equidigital number, since it uses as much as digits as its factorization.

101121020111 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 11.

Adding to 101121020111 its reverse (111020121101), we get a palindrome (212141141212).

The spelling of 101121020111 in words is "one hundred one billion, one hundred twenty-one million, twenty thousand, one hundred eleven".