20211023120 has 20 divisors (see below), whose sum is σ = 46990628940. Its totient is φ = 8084409216.

The previous prime is 20211023117. The next prime is 20211023137. The reversal of 20211023120 is 2132011202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11808734224 + 8402288896 = 108668^2 + 91664^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 20211023095 and 20211023104.

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 3 ways as a sum of consecutive naturals, for example, 126318815 + ... + 126318974.

It is an arithmetic number, because the mean of its divisors is an integer number (2349531447).

Almost surely, 2^20211023120 is an apocalyptic number.

20211023120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211023120 is an abundant number, since it is smaller than the sum of its proper divisors (26779605820).

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

20211023120 is a wasteful number, since it uses less digits than its factorization.

20211023120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252637802 (or 252637796 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20211023120 its reverse (2132011202), we get a palindrome (22343034322).

The spelling of 20211023120 in words is "twenty billion, two hundred eleven million, twenty-three thousand, one hundred twenty".