20100121001212 has 24 divisors (see below), whose sum is σ = 40200413460480. Its totient is φ = 8614300830960.

The previous prime is 20100121001189. The next prime is 20100121001237. The reversal of 20100121001212 is 21210012100102.

It is a junction number, because it is equal to n+sod(n) for n = 20100121001192 and 20100121001201.

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, 5760537 + ... + 8566447.

It is an arithmetic number, because the mean of its divisors is an integer number (1675017227520).

Almost surely, 2^{20100121001212} is an apocalyptic number.

It is an amenable number.

20100121001212 is an abundant number, since it is smaller than the sum of its proper divisors (20100292459268).

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

20100121001212 is a wasteful number, since it uses less digits than its factorization.

20100121001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061761 (or 3061759 counting only the distinct ones).

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

Adding to 20100121001212 its reverse (21210012100102), we get a palindrome (41310133101314).

The spelling of 20100121001212 in words is "twenty trillion, one hundred billion, one hundred twenty-one million, one thousand, two hundred twelve".