201121220112 has 40 divisors (see below), whose sum is σ = 530617693056. Its totient is φ = 65614014336.

The previous prime is 201121220039. The next prime is 201121220117. The reversal of 201121220112 is 211022121102.

It is a junction number, because it is equal to n+sod(n) for n = 201121220091 and 201121220100.

It is not an unprimeable number, because it can be changed into a prime (201121220117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44572483 + ... + 44576994.

Almost surely, 2^201121220112 is an apocalyptic number.

It is an amenable number.

201121220112 is an abundant number, since it is smaller than the sum of its proper divisors (329496472944).

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

201121220112 is a wasteful number, since it uses less digits than its factorization.

201121220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89149535 (or 89149529 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201121220112 its reverse (211022121102), we get a palindrome (412143341214).

The spelling of 201121220112 in words is "two hundred one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twelve".