11651020111 has 2 divisors, whose sum is σ = 11651020112. Its totient is φ = 11651020110.

The previous prime is 11651020097. The next prime is 11651020123. The reversal of 11651020111 is 11102015611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11651020111 - 2⁵ = 11651020079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11651026111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5825510055 + 5825510056.

It is an arithmetic number, because the mean of its divisors is an integer number (5825510056).

Almost surely, 2^11651020111 is an apocalyptic number.

11651020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11651020111 is an equidigital number, since it uses as much as digits as its factorization.

11651020111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 11651020111 its reverse (11102015611), we get a palindrome (22753035722).

The spelling of 11651020111 in words is "eleven billion, six hundred fifty-one million, twenty thousand, one hundred eleven".