20100121102012 has 12 divisors (see below), whose sum is σ = 40200242204080. Its totient is φ = 8614337615136.

The previous prime is 20100121101947. The next prime is 20100121102051. The reversal of 20100121102012 is 21020112100102.

20100121102012 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20100121101983 and 20100121102001.

It is a congruent number.

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, 358930733937 + ... + 358930733992.

Almost surely, 2^{20100121102012} is an apocalyptic number.

It is an amenable number.

20100121102012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20100121102012 is a wasteful number, since it uses less digits than its factorization.

20100121102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717861467940 (or 717861467938 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20100121102012 its reverse (21020112100102), we get a palindrome (41120233202114).

The spelling of 20100121102012 in words is "twenty trillion, one hundred billion, one hundred twenty-one million, one hundred two thousand, twelve".