2211312051220 has 24 divisors (see below), whose sum is σ = 4643897063904. Its totient is φ = 884497819296.

The previous prime is 2211312051133. The next prime is 2211312051233. The reversal of 2211312051220 is 221502131122.

It is a junction number, because it is equal to n+sod(n) for n = 2211312051191 and 2211312051200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009374 + ... + 2332693.

It is an arithmetic number, because the mean of its divisors is an integer number (193495710996).

Almost surely, 2^{2211312051220} is an apocalyptic number.

2211312051220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211312051220 is an abundant number, since it is smaller than the sum of its proper divisors (2432585012684).

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

2211312051220 is a wasteful number, since it uses less digits than its factorization.

2211312051220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375159 (or 3375157 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 2211312051220 its reverse (221502131122), we get a palindrome (2432814182342).

The spelling of 2211312051220 in words is "two trillion, two hundred eleven billion, three hundred twelve million, fifty-one thousand, two hundred twenty".