121220201111112 has 24 divisors (see below), whose sum is σ = 328304711342790. Its totient is φ = 40406733703680.

The previous prime is 121220201111047. The next prime is 121220201111153. The reversal of 121220201111112 is 211111102022121.

It is a happy number.

121220201111112 is a `hidden beast` number, since 1 + 21 + 220 + 201 + 111 + 112 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79112379296196 + 42107821814916 = 8894514^2 + 6489054^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 841806952089 + ... + 841806952232.

Almost surely, 2^{121220201111112} is an apocalyptic number.

121220201111112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121220201111112 is an abundant number, since it is smaller than the sum of its proper divisors (207084510231678).

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

121220201111112 is a wasteful number, since it uses less digits than its factorization.

121220201111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683613904333 (or 1683613904326 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121220201111112 its reverse (211111102022121), we get a palindrome (332331303133233).

The spelling of 121220201111112 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred one million, one hundred eleven thousand, one hundred twelve".