20121100202212 has 12 divisors (see below), whose sum is σ = 35213656577596. Its totient is φ = 10060055465760.

The previous prime is 20121100202209. The next prime is 20121100202233. The reversal of 20121100202212 is 21220200112102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9307038953536 + 10814061248676 = 3050744^2 + 3288474^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123567303 + ... + 123730030.

Almost surely, 2^{20121100202212} is an apocalyptic number.

It is an amenable number.

20121100202212 is a deficient number, since it is larger than the sum of its proper divisors (15092556375384).

20121100202212 is a wasteful number, since it uses less digits than its factorization.

20121100202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247317678 (or 247317676 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20121100202212 its reverse (21220200112102), we get a palindrome (41341300314314).

The spelling of 20121100202212 in words is "twenty trillion, one hundred twenty-one billion, one hundred million, two hundred two thousand, two hundred twelve".