20100121010212 has 12 divisors (see below), whose sum is σ = 35371721332080. Its totient is φ = 9993914915336.

The previous prime is 20100121010209. The next prime is 20100121010237. The reversal of 20100121010212 is 21201012100102.

It is a junction number, because it is equal to n+sod(n) for n = 20100121010192 and 20100121010201.

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, 14036396638 + ... + 14036398069.

It is an arithmetic number, because the mean of its divisors is an integer number (2947643444340).

Almost surely, 2^{20100121010212} is an apocalyptic number.

It is an amenable number.

20100121010212 is a deficient number, since it is larger than the sum of its proper divisors (15271600321868).

20100121010212 is a wasteful number, since it uses less digits than its factorization.

20100121010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28072794890 (or 28072794888 counting only the distinct ones).

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

Adding to 20100121010212 its reverse (21201012100102), we get a palindrome (41301133110314).

The spelling of 20100121010212 in words is "twenty trillion, one hundred billion, one hundred twenty-one million, ten thousand, two hundred twelve".