20221000120 has 32 divisors (see below), whose sum is σ = 45552741120. Its totient is φ = 8078535040.

The previous prime is 20221000109. The next prime is 20221000141. The reversal of 20221000120 is 2100012202.

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 = 20221000097 and 20221000106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275032 + ... + 340711.

It is an arithmetic number, because the mean of its divisors is an integer number (1423523160).

Almost surely, 2^20221000120 is an apocalyptic number.

20221000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221000120 is an abundant number, since it is smaller than the sum of its proper divisors (25331741000).

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

20221000120 is a wasteful number, since it uses less digits than its factorization.

20221000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616575 (or 616571 counting only the distinct ones).

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

Adding to 20221000120 its reverse (2100012202), we get a palindrome (22321012322).

The spelling of 20221000120 in words is "twenty billion, two hundred twenty-one million, one hundred twenty", and thus it is an aban number.