2120221020 has 48 divisors (see below), whose sum is σ = 6249075840. Its totient is φ = 535634496.

The previous prime is 2120221007. The next prime is 2120221043. The reversal of 2120221020 is 201220212.

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 = 2120220987 and 2120221005.

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 15 ways as a sum of consecutive naturals, for example, 928782 + ... + 931061.

It is an arithmetic number, because the mean of its divisors is an integer number (130189080).

Almost surely, 2^2120221020 is an apocalyptic number.

2120221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120221020 is an abundant number, since it is smaller than the sum of its proper divisors (4128854820).

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

2120221020 is a wasteful number, since it uses less digits than its factorization.

2120221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859874 (or 1859872 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2120221020 is about 46045.8577941599. The cubic root of 2120221020 is about 1284.6762991311.

Adding to 2120221020 its reverse (201220212), we get a palindrome (2321441232).

The spelling of 2120221020 in words is "two billion, one hundred twenty million, two hundred twenty-one thousand, twenty".