22000121020 has 24 divisors (see below), whose sum is σ = 46203922800. Its totient is φ = 8799349632.

The previous prime is 22000120999. The next prime is 22000121021. The reversal of 22000121020 is 2012100022.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 22000120988 and 22000121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000121021) 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, 269136 + ... + 341224.

It is an arithmetic number, because the mean of its divisors is an integer number (1925163450).

Almost surely, 2^22000121020 is an apocalyptic number.

22000121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22000121020 is an abundant number, since it is smaller than the sum of its proper divisors (24203801780).

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

22000121020 is a wasteful number, since it uses less digits than its factorization.

22000121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87357 (or 87355 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 22000121020 its reverse (2012100022), we get a palindrome (24012221042).

The spelling of 22000121020 in words is "twenty-two billion, one hundred twenty-one thousand, twenty".