2222121020 has 24 divisors (see below), whose sum is σ = 5333090784. Its totient is φ = 761870016.

The previous prime is 2222121007. The next prime is 2222121053. The reversal of 2222121020 is 201212222.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2222120986 and 2222121004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7936007 + ... + 7936286.

It is an arithmetic number, because the mean of its divisors is an integer number (222212116).

Almost surely, 2^2222121020 is an apocalyptic number.

2222121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2222121020 is an abundant number, since it is smaller than the sum of its proper divisors (3110969764).

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

2222121020 is a wasteful number, since it uses less digits than its factorization.

2222121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15872309 (or 15872307 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2222121020 is about 47139.3786552178. The cubic root of 2222121020 is about 1304.9360704236.

Adding to 2222121020 its reverse (201212222), we get a palindrome (2423333242).

The spelling of 2222121020 in words is "two billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty".