20012212100 has 18 divisors (see below), whose sum is σ = 43426500474. Its totient is φ = 8004884800.

The previous prime is 20012212069. The next prime is 20012212123. The reversal of 20012212100 is 121221002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3300962116 + 16711249984 = 57454^2 + 129272^2 .

It is a super-3 number, since 3×20012212100³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100060961 + ... + 100061160.

Almost surely, 2^20012212100 is an apocalyptic number.

20012212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012212100 is an abundant number, since it is smaller than the sum of its proper divisors (23414288374).

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

20012212100 is a wasteful number, since it uses less digits than its factorization.

20012212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200122135 (or 200122128 counting only the distinct ones).

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

Adding to 20012212100 its reverse (121221002), we get a palindrome (20133433102).

The spelling of 20012212100 in words is "twenty billion, twelve million, two hundred twelve thousand, one hundred".