12111221202120 has 96 divisors (see below), whose sum is σ = 40425292435320. Its totient is φ = 3142370903040.

The previous prime is 12111221202107. The next prime is 12111221202133. The reversal of 12111221202120 is 2120212211121.

12111221202120 is a `hidden beast` number, since 1 + 211 + 1 + 221 + 20 + 212 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (12111221202107) and next prime (12111221202133).

It can be written as a sum of positive squares in 4 ways, for example, as 10397954871396 + 1713266330724 = 3224586^2 + 1308918^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12111221202093 and 12111221202102.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454612101 + ... + 454638740.

Almost surely, 2^{12111221202120} is an apocalyptic number.

12111221202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111221202120 is an abundant number, since it is smaller than the sum of its proper divisors (28314071233200).

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

12111221202120 is a wasteful number, since it uses less digits than its factorization.

12111221202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909250895 (or 909250888 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12111221202120 its reverse (2120212211121), we get a palindrome (14231433413241).

The spelling of 12111221202120 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, two hundred two thousand, one hundred twenty".