21212011011151 has 2 divisors, whose sum is σ = 21212011011152. Its totient is φ = 21212011011150.

The previous prime is 21212011011089. The next prime is 21212011011167. The reversal of 21212011011151 is 15111011021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212011011151 - 2¹¹ = 21212011009103 is a prime.

It is a super-2 number, since 2×21212011011151² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212011911151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606005505575 + 10606005505576.

It is an arithmetic number, because the mean of its divisors is an integer number (10606005505576).

Almost surely, 2^{21212011011151} is an apocalyptic number.

21212011011151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212011011151 is an equidigital number, since it uses as much as digits as its factorization.

21212011011151 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 19.

Adding to 21212011011151 its reverse (15111011021212), we get a palindrome (36323022032363).

The spelling of 21212011011151 in words is "twenty-one trillion, two hundred twelve billion, eleven million, eleven thousand, one hundred fifty-one".