20100212120 has 32 divisors (see below), whose sum is σ = 45733636800. Its totient is φ = 7949745408.

The previous prime is 20100212117. The next prime is 20100212179. The reversal of 20100212120 is 2121200102.

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 7 ways as a sum of consecutive naturals, for example, 2819504 + ... + 2826623.

It is an arithmetic number, because the mean of its divisors is an integer number (1429176150).

Almost surely, 2^20100212120 is an apocalyptic number.

20100212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100212120 is an abundant number, since it is smaller than the sum of its proper divisors (25633424680).

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

20100212120 is a wasteful number, since it uses less digits than its factorization.

20100212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5646227 (or 5646223 counting only the distinct ones).

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

Adding to 20100212120 its reverse (2121200102), we get a palindrome (22221412222).

The spelling of 20100212120 in words is "twenty billion, one hundred million, two hundred twelve thousand, one hundred twenty".