2011211620 has 24 divisors (see below), whose sum is σ = 4607503488. Its totient is φ = 731349600.

The previous prime is 2011211603. The next prime is 2011211623. The reversal of 2011211620 is 261121102.

It is a junction number, because it is equal to n+sod(n) for n = 2011211594 and 2011211603.

It is not an unprimeable number, because it can be changed into a prime (2011211623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4570716 + ... + 4571155.

It is an arithmetic number, because the mean of its divisors is an integer number (191979312).

Almost surely, 2^2011211620 is an apocalyptic number.

2011211620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011211620 is an abundant number, since it is smaller than the sum of its proper divisors (2596291868).

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

2011211620 is a wasteful number, since it uses less digits than its factorization.

2011211620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141891 (or 9141889 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2011211620 is about 44846.5340912762. The cubic root of 2011211620 is about 1262.2709569790.

Adding to 2011211620 its reverse (261121102), we get a palindrome (2272332722).

The spelling of 2011211620 in words is "two billion, eleven million, two hundred eleven thousand, six hundred twenty".