22001000120 has 32 divisors (see below), whose sum is σ = 54002455920. Its totient is φ = 8000363520.

The previous prime is 22001000107. The next prime is 22001000123. The reversal of 22001000120 is 2100010022.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 22001000098 and 22001000107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001000123) 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, 25000697 + ... + 25001576.

Almost surely, 2^22001000120 is an apocalyptic number.

22001000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001000120 is an abundant number, since it is smaller than the sum of its proper divisors (32001455800).

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

22001000120 is a wasteful number, since it uses less digits than its factorization.

22001000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50002295 (or 50002291 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 22001000120 its reverse (2100010022), we get a palindrome (24101010142).

The spelling of 22001000120 in words is "twenty-two billion, one million, one hundred twenty", and thus it is an aban number.