22122121000 has 64 divisors (see below), whose sum is σ = 59160890880. Its totient is φ = 7584724800.

The previous prime is 22122120997. The next prime is 22122121009. The reversal of 22122121000 is 12122122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22122121009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1573152 + ... + 1587151.

It is an arithmetic number, because the mean of its divisors is an integer number (924388920).

Almost surely, 2^22122121000 is an apocalyptic number.

22122121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22122121000 is an abundant number, since it is smaller than the sum of its proper divisors (37038769880).

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

22122121000 is a wasteful number, since it uses less digits than its factorization.

22122121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160331 (or 3160317 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22122121000 its reverse (12122122), we get a palindrome (22134243122).

It can be divided in two parts, 2212 and 2121000, that added together give a palindrome (2123212).

The spelling of 22122121000 in words is "twenty-two billion, one hundred twenty-two million, one hundred twenty-one thousand".