20100121112 has 16 divisors (see below), whose sum is σ = 37736493840. Its totient is φ = 10037056096.

The previous prime is 20100121091. The next prime is 20100121123. The reversal of 20100121112 is 21112100102.

It is a junction number, because it is equal to n+sod(n) for n = 20100121093 and 20100121102.

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, 1618988 + ... + 1631355.

It is an arithmetic number, because the mean of its divisors is an integer number (2358530865).

Almost surely, 2^20100121112 is an apocalyptic number.

It is an amenable number.

20100121112 is a deficient number, since it is larger than the sum of its proper divisors (17636372728).

20100121112 is a wasteful number, since it uses less digits than its factorization.

20100121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251122 (or 3251118 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20100121112 its reverse (21112100102), we get a palindrome (41212221214).

The spelling of 20100121112 in words is "twenty billion, one hundred million, one hundred twenty-one thousand, one hundred twelve".