2012011312220 has 72 divisors (see below), whose sum is σ = 5228848394784. Its totient is φ = 636768407808.

The previous prime is 2012011312193. The next prime is 2012011312229. The reversal of 2012011312220 is 222131102102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012011312229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42495599 + ... + 42542918.

It is an arithmetic number, because the mean of its divisors is an integer number (72622894372).

Almost surely, 2^{2012011312220} is an apocalyptic number.

2012011312220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012011312220 is an abundant number, since it is smaller than the sum of its proper divisors (3216837082564).

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

2012011312220 is a wasteful number, since it uses less digits than its factorization.

2012011312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85038559 (or 85038544 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2012011312220 its reverse (222131102102), we get a palindrome (2234142414322).

The spelling of 2012011312220 in words is "two trillion, twelve billion, eleven million, three hundred twelve thousand, two hundred twenty".