201111212051 has 2 divisors, whose sum is σ = 201111212052. Its totient is φ = 201111212050.

The previous prime is 201111212021. The next prime is 201111212069. The reversal of 201111212051 is 150212111102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201111212051 - 2²² = 201107017747 is a prime.

It is a super-2 number, since 2×201111212051² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201111212021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555606025 + 100555606026.

It is an arithmetic number, because the mean of its divisors is an integer number (100555606026).

Almost surely, 2^201111212051 is an apocalyptic number.

201111212051 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111212051 is an equidigital number, since it uses as much as digits as its factorization.

201111212051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 201111212051 its reverse (150212111102), we get a palindrome (351323323153).

The spelling of 201111212051 in words is "two hundred one billion, one hundred eleven million, two hundred twelve thousand, fifty-one".