2211121020 has 24 divisors (see below), whose sum is σ = 6191139024. Its totient is φ = 589632256.

The previous prime is 2211121019. The next prime is 2211121061. The reversal of 2211121020 is 201211122.

2211121020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2211120987 and 2211121005.

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, 18425949 + ... + 18426068.

It is an arithmetic number, because the mean of its divisors is an integer number (257964126).

Almost surely, 2^2211121020 is an apocalyptic number.

2211121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211121020 is an abundant number, since it is smaller than the sum of its proper divisors (3980018004).

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

2211121020 is a wasteful number, since it uses less digits than its factorization.

2211121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36852029 (or 36852027 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2211121020 is about 47022.5586288113. The cubic root of 2211121020 is about 1302.7792650310.

Adding to 2211121020 its reverse (201211122), we get a palindrome (2412332142).

The spelling of 2211121020 in words is "two billion, two hundred eleven million, one hundred twenty-one thousand, twenty".