211211212151 has 2 divisors, whose sum is σ = 211211212152. Its totient is φ = 211211212150.

The previous prime is 211211212109. The next prime is 211211212171. The reversal of 211211212151 is 151212112112.

It is an a-pointer prime, because the next prime (211211212171) can be obtained adding 211211212151 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211211212151 - 2¹⁸ = 211210950007 is a prime.

It is a super-2 number, since 2×211211212151² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211211212171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605606075 + 105605606076.

It is an arithmetic number, because the mean of its divisors is an integer number (105605606076).

Almost surely, 2^211211212151 is an apocalyptic number.

211211212151 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211212151 is an equidigital number, since it uses as much as digits as its factorization.

211211212151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80, while the sum is 20.

Adding to 211211212151 its reverse (151212112112), we get a palindrome (362423324263).

The spelling of 211211212151 in words is "two hundred eleven billion, two hundred eleven million, two hundred twelve thousand, one hundred fifty-one".