31212111200051 has 2 divisors, whose sum is σ = 31212111200052. Its totient is φ = 31212111200050.

The previous prime is 31212111200047. The next prime is 31212111200183. The reversal of 31212111200051 is 15000211121213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31212111200051 - 2² = 31212111200047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31212111199996 and 31212111200032.

It is not a weakly prime, because it can be changed into another prime (31212111200551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606055600025 + 15606055600026.

It is an arithmetic number, because the mean of its divisors is an integer number (15606055600026).

Almost surely, 2^{31212111200051} is an apocalyptic number.

31212111200051 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212111200051 is an equidigital number, since it uses as much as digits as its factorization.

31212111200051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 31212111200051 its reverse (15000211121213), we get a palindrome (46212322321264).

The spelling of 31212111200051 in words is "thirty-one trillion, two hundred twelve billion, one hundred eleven million, two hundred thousand, fifty-one".