2012112212381 has 2 divisors, whose sum is σ = 2012112212382. Its totient is φ = 2012112212380.

The previous prime is 2012112212177. The next prime is 2012112212389. The reversal of 2012112212381 is 1832122112102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1357807562500 + 654304649881 = 1165250^2 + 808891^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012112212381 - 2³⁴ = 1994932343197 is a prime.

It is a super-2 number, since 2×2012112212381² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2012112212381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012112212389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006056106190 + 1006056106191.

It is an arithmetic number, because the mean of its divisors is an integer number (1006056106191).

Almost surely, 2^{2012112212381} is an apocalyptic number.

It is an amenable number.

2012112212381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012112212381 is an equidigital number, since it uses as much as digits as its factorization.

2012112212381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

Adding to 2012112212381 its reverse (1832122112102), we get a palindrome (3844234324483).

The spelling of 2012112212381 in words is "two trillion, twelve billion, one hundred twelve million, two hundred twelve thousand, three hundred eighty-one".