20201223120 has 80 divisors (see below), whose sum is σ = 67441016832. Its totient is φ = 4972608000.

The previous prime is 20201223101. The next prime is 20201223139. The reversal of 20201223120 is 2132210202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20201223101) and next prime (20201223139).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20201223120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3234256 + ... + 3240495.

Almost surely, 2^20201223120 is an apocalyptic number.

20201223120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201223120 is an abundant number, since it is smaller than the sum of its proper divisors (47239793712).

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

20201223120 is a wasteful number, since it uses less digits than its factorization.

20201223120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474780 (or 6474774 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20201223120 its reverse (2132210202), we get a palindrome (22333433322).

The spelling of 20201223120 in words is "twenty billion, two hundred one million, two hundred twenty-three thousand, one hundred twenty".