2122221020 has 24 divisors (see below), whose sum is σ = 4506742800. Its totient is φ = 839349632.

The previous prime is 2122221019. The next prime is 2122221029. The reversal of 2122221020 is 201222212.

It is a junction number, because it is equal to n+sod(n) for n = 2122220986 and 2122221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122221029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594350 + ... + 597909.

It is an arithmetic number, because the mean of its divisors is an integer number (187780950).

Almost surely, 2^2122221020 is an apocalyptic number.

2122221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122221020 is an abundant number, since it is smaller than the sum of its proper divisors (2384521780).

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

2122221020 is a wasteful number, since it uses less digits than its factorization.

2122221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192357 (or 1192355 counting only the distinct ones).

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

The square root of 2122221020 is about 46067.5701551536. The cubic root of 2122221020 is about 1285.0801163289.

Adding to 2122221020 its reverse (201222212), we get a palindrome (2323443232).

The spelling of 2122221020 in words is "two billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty".