51123203012211 has 32 divisors (see below), whose sum is σ = 74537460748800. Its totient is φ = 30910263552000.

The previous prime is 51123203012207. The next prime is 51123203012243. The reversal of 51123203012211 is 11221030232115.

It is not a de Polignac number, because 51123203012211 - 2² = 51123203012207 is a prime.

It is a super-2 number, since 2×51123203012211² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51123203012251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103220061 + ... + 103714161.

It is an arithmetic number, because the mean of its divisors is an integer number (2329295648400).

Almost surely, 2^{51123203012211} is an apocalyptic number.

51123203012211 is a deficient number, since it is larger than the sum of its proper divisors (23414257736589).

51123203012211 is a wasteful number, since it uses less digits than its factorization.

51123203012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501547.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 51123203012211 its reverse (11221030232115), we get a palindrome (62344233244326).

The spelling of 51123203012211 in words is "fifty-one trillion, one hundred twenty-three billion, two hundred three million, twelve thousand, two hundred eleven".