51212102211 has 12 divisors (see below), whose sum is σ = 76523831280. Its totient is φ = 32964111600.

The previous prime is 51212102189. The next prime is 51212102233. The reversal of 51212102211 is 11220121215.

51212102211 is a `hidden beast` number, since 512 + 121 + 0 + 22 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (51212102189) and next prime (51212102233).

It is not a de Polignac number, because 51212102211 - 2⁶ = 51212102147 is a prime.

It is a super-2 number, since 2×51212102211² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51212101211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98107215 + ... + 98107736.

It is an arithmetic number, because the mean of its divisors is an integer number (6376985940).

Almost surely, 2^51212102211 is an apocalyptic number.

51212102211 is a deficient number, since it is larger than the sum of its proper divisors (25311729069).

51212102211 is a wasteful number, since it uses less digits than its factorization.

51212102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196214986 (or 196214983 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 51212102211 its reverse (11220121215), we get a palindrome (62432223426).

The spelling of 51212102211 in words is "fifty-one billion, two hundred twelve million, one hundred two thousand, two hundred eleven".