20021012120 has 64 divisors (see below), whose sum is σ = 48067884000. Its totient is φ = 7482958848.

The previous prime is 20021012059. The next prime is 20021012161. The reversal of 20021012120 is 2121012002.

It is a happy number.

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, 124955 + ... + 235914.

Almost surely, 2^20021012120 is an apocalyptic number.

20021012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021012120 is an abundant number, since it is smaller than the sum of its proper divisors (28046871880).

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

20021012120 is a wasteful number, since it uses less digits than its factorization.

20021012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360972 (or 360968 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021012120 its reverse (2121012002), we get a palindrome (22142024122).

The spelling of 20021012120 in words is "twenty billion, twenty-one million, twelve thousand, one hundred twenty".