12122221020 has 96 divisors (see below), whose sum is σ = 41775057408. Its totient is φ = 2557654272.

The previous prime is 12122220973. The next prime is 12122221037. The reversal of 12122221020 is 2012222121.

12122221020 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 (15).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1104634 + ... + 1115553.

It is an arithmetic number, because the mean of its divisors is an integer number (435156848).

Almost surely, 2^12122221020 is an apocalyptic number.

12122221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122221020 is an abundant number, since it is smaller than the sum of its proper divisors (29652836388).

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

12122221020 is a wasteful number, since it uses less digits than its factorization.

12122221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220219 (or 2220217 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12122221020 its reverse (2012222121), we get a palindrome (14134443141).

The spelling of 12122221020 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty".