2012122222278 has 80 divisors (see below), whose sum is σ = 4699559927040. Its totient is φ = 574293576528.

The previous prime is 2012122222277. The next prime is 2012122222373. The reversal of 2012122222278 is 8722222212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012122222277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13858383 + ... + 14002821.

It is an arithmetic number, because the mean of its divisors is an integer number (58744499088).

Almost surely, 2^{2012122222278} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2012122222278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2349779963520).

2012122222278 is an abundant number, since it is smaller than the sum of its proper divisors (2687437704762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2012122222278 is an equidigital number, since it uses as much as digits as its factorization.

2012122222278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145439 (or 145418 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The spelling of 2012122222278 in words is "two trillion, twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred seventy-eight".