20100120212 has 12 divisors (see below), whose sum is σ = 35183123136. Its totient is φ = 10047799320.

The previous prime is 20100120181. The next prime is 20100120217. The reversal of 20100120212 is 21202100102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20100120193 and 20100120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100120217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 545114 + ... + 580817.

It is an arithmetic number, because the mean of its divisors is an integer number (2931926928).

Almost surely, 2^20100120212 is an apocalyptic number.

It is an amenable number.

20100120212 is a deficient number, since it is larger than the sum of its proper divisors (15083002924).

20100120212 is a wasteful number, since it uses less digits than its factorization.

20100120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130398 (or 1130396 counting only the distinct ones).

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

Adding to 20100120212 its reverse (21202100102), we get a palindrome (41302220314).

The spelling of 20100120212 in words is "twenty billion, one hundred million, one hundred twenty thousand, two hundred twelve".